Hello guys. Really straight forward topic. New player buiding a character.

I was wondering which Subclasses fit both categories of "easy to play" and "feel strong".

I wanna take the time to learn more about the game without being overwhelmed and still contributes to the campaign success (Roleplaying and Combat).

welcome to the game. What kind of character are you looking at? Spell caster, melee warrior, ranged, support, some kind of combo? Someone who stands in the middle of a fight or sticks to the edges? something mechanically easier, or more demanding?

probably You want someone without spells, since that adds a layer of complexity, but if you want some magic, we can work with that. 

background is pretty important also, and can really open up different choices, either help fill gaps or reenforce things you’re good at doing. Any ideas there? 

I guess a melee class since I read spellcasters are a bit more complex.

I'm thinking monk, barb, fighter or rogue

Easy one that's powerful can be monk. I recently looked at way of the open hand monk, which is a good subclass. They have an ability that can instantly kill, although it it at a late level.

Monks are also pretty easy to play. Don't need to know anything but the damage your fist does, and the ki you use while fighting.

I agree that the non-spellcasters are easier to play than the spellcasters. You'll probably find that you can fairly quickly pick up the ins and out of any of them.

Having said that, of the non-spellcasters, I think the Monk is probably one of the more difficult for a new player. I love Monks as a class but their core Martial Arts ability is not as straight-forward as those of some other classes and has some edge-cases that may not work exactly as you may intuit. They have a resource (ki) to manage and have a lot of options to consider for their bonus action. Also, in combat encounters, they tend to be at their best if played as skirmishers rather than going toe-to-toe, which can be a bit more challenging tactically.

In my opinion, probably the easiest class to learn and play is the Champion Fighter, then perhaps the Berserker or Totem Warrior Barbarians.

As for "strong", I feel it's fairly hard to go wrong in 5th edition. You can optimise til your heart's content if you want to, absolutely, and you'll find endless discussions about the merits of this option over that and, I admit, I get as much nerdtastic fun out of all that as the next geek. But really, provided you don't intentionally build against type, you're generally going to end up with a character that can pull their weight mechanically. And btw, there is absolutely merit in building against type, this just isn't that discussion.

Probably what's more likely to effect how useful your character feels is how they fit into the group and game dynamic. What role does your character play in the group? What is their area of expertise and how does it intersect with the needs of the group and the play-style of the game? That's something you'll have to talk to your DM about.

It is a half spellcaster, but maybe paladin. They get a good assortment of abities and passive auras to protect and buff, but they are mostly about divine smite to do a ton of damage with a weapon attack.

I’d agree with champion fighter probably being the easiest to learn and play. They have fewer abilities to keep track of and most of the things they get are passive “always on” buffs so you don’t have to figure out if something is right for a situation, or worry about running out of resources.

The big downsides are that while you’ll be good at combat, you won’t be as good at social situations, though you can mitigate that with a background that gives you proficiency in a social skill or two. The other is that you won’t be near as flashy as the other characters who are setting off explosions, running up walls or calling down the wrath of god. But you can watch and learn how the others play those characters and decide what you might want for your next character, and the one after that. 

And your DM might be willing to let you change. If you play the champion for a bit and get bored, you can always see if you can swap out for something else after you have a better handle on how to play. 

Quote from DxJxC >>

It is a half spellcaster, but maybe paladin. They get a good assortment of abities and passive auras to protect and buff, but they are mostly about divine smite to do a ton of damage with a weapon attack.

 I second paladin. It's a melee- focused class with mostly buff/debuff spells that are easier to manage than other classes. The spell list isn't huge, and you start out knowing all of them, with the ability to switch in and out which ones you've prepared each day. 

There was a thread also a few days ago that was ranking classes.

Generally, Fighter / Barbarian / Rogue are the easiest. Of those, Rogue probably offers more breadth since you have a lot of skills.

Paladin / Monk / Ranger are good too, but they each start adding in more (spells or ki points).

Of those three, Paladin is probably the easiest, since no one will fault you if you just burn all of your spell slots smiting. Plus Paladins make it easy to meaningfully contribute to social situations. Monks aren't that much harder. Ranger is moderate only because the base ranger is very dependent on where and what you are fighting.