Hey guys! 

I was curious if any of you had any good plots for a hag coven. Or rather how much information my players should receive of this at first and how can they get more info?

So the world my pc's are currently in is so far just an island with a big fishing/shipbuilding village and a really small farming village (viking themed dwarves) and mountains, hills forests, all the good stuff. We only had 1 session so far and i want to make the first bbeg('s) a hag coven. I was thinking a sea hag, green hag and night hag.(the players are lvl 3).

So the sea hag would terrorize ships coming to port from a cave near the coast with some of her merfolk allies that she made.

The green hag would have a hut in the swamp where they would take care of children that "go missing" from the village with her corpse eating minions and cockatrice as chickens. Which is all covered by an illusion.

The Night hag would live on the far side of the island in the castle they took from the local lord with her undead minions and she would terrorize people's dreams and steal their souls. (I was thinking the local lord could ask the pc's for taking it back as a boss quest or something.

Their ultimate goal would be to summon a "lost sorrowsworn" or some other creepy monster and keep terrorizing the village for their enjoyment.

Any idea how i should start feeding my players all this? And how much at a time?

I'm fairly new to dm-ing and so far this "story" feels like it's missing a lot.

Thanks for the help!

First of all, don't use the night hag at all. Instead, replace her with another green hag or sea hag. The CR and planar powers of the night hag are simply too powerful for a first-tier party, and I advise against featuring a night hag in games for parties below 10th level.

As for the other hags, start with small quests related to the ripple effects of the hags' actions. As they go on, drop hints of what caused these problems. Eventually, they will get to the bottom of it.

Hi! Thanks for the answer!

Do you have any ideas about what the quests and then hints could be?

For the sea hag i have some starter points. Like "Fishing boats are disappearing. Help find out what causes it." And when they get a boat to go out to sea they get attacked which somehow could lead to them realizing there's something controlling this ( i still don't know what to do after that but at least it's a start).

But for the green hag all i thought about was "Children keep disappearing. Find out why" but then they don't really have an actual goal, like go here or go there. And i'm kinda lost on how to make this work.

Quote from DanielGolya >>

I was curious if any of you had any good plots for a hag coven.  

 I know this may not be super helpful for the exact situation you're running, but there is an adventure in Candlekeep Mysteries that uses a coven of hag's well. The adventure is called (spoiler warning) 

Why are the hags doing all this in the first place? Are they evil for no better reason than to be evil? 

Try this on for size (and I'm writing as I come up with ideas, so don't expect anything wildly inventive): The hags of the coven yearn for the beauty they had when they were young. A night hag (not part of the coven) has promised to make them all young again if they will but help summon her to this plane. Such a summoning isn't easy, and the hags will need quite many thing: Gold, gems, fine cloth, spices, and quite a high number of human sacrifices. This is all bunk, btw, it's simply that the night hag desires such things.

So the hags abduct children, sink ships and so on, in order to summon a powerful night hag who will (or so she has promised) make them young again.

None of this is known to the players, obviously. What is known is that the island community is in trouble: There hasn't been a ship in months, and anything not produced locally is running out. No metal, maybe no lumber (depends on the island), no tools that require more work than the island can provide, and no food that isn't grown locally. On top of this, fishing boats have begun disappearing. The island is looking at hunger as well as shortage of all other things. 

So the local quest giver of choice has gathered the PC's to look into whatever is happening. First quest: Find the missing fishing boats. They will be in some hidden cove along the shore, and the corpses of the fishermen will be guarded by ... I dunno, giant crabs or carrion crawlers or whatever. Investigation will reveal, however, that the animals didn't kill them - their hearts were removed. Somewhere nearby there will be a ritual site of some sort. 

That's all they learn, initially. Next quest, where are the children disappearing to? Well, that trail needs to end somewhere (we want the children still to be alive, right? It's no so dark a game as to have 20 children be dead without the PC's having any chance to save them. That's my hope - poor kids.) So .. how about a classic house of pancakes? Metaphorically, that is: The children are being lured into the forest by a nice older lady who promises them treats. They find cages, maybe a few kids they can rescue - but not the hag herself. The rescued kids can relate, however, that the 'nice old lady' took some other kids on a wagon ... west, let's say. 

And so on from there.

I like to lean into the weird stuff hags can pull. Hags are rarely used for combat encounters in my games, since if the players attack they can just teleport or shapeshifter their way out. Hags are weird, and kooky, and enjoy messing with people’s heads. 
One of my favourite hag encounters was when the players were travelling through the forest and they came across three villagers huddled together, sitting by a fire, slurping some stew. The villagers ask the PC’s to join them. The groups chat a bit, enjoy their food, etc. Then once the PC’s have finished their meal the illusion drops. The villagers are green hags, and the stew was composed of the remains of several human children. The real villagers are turning on a spit over the fire. The hags shriek with laughter, transform into crows, and flap of in the direction of the mountains, where the players have heard a number of fey make their home. 
if this works out, you’ve got some good antagonists, a plot hook, and some angry players out for revenge.