New to Dnd! Love some guidance on my Goliath Druid build

Hey Guys!

I've just dived into the world of DnD and I'm so excited!!!

SO I've got a general idea of the character I want to play as...a goliath druid! Their name is Zagga, a giant lovable goofball that has been sent away from their tribe for being more connected to nature than fighting. 
In my group we have the background of a Far Traveler, and I think that'd fit nicely into my character, coming from far off mountains and traveling around connecting to nature before finding my party. This would include a cartographer tool set. 

I'd like to be a Warden Druid, does that mean I can use any simple or martial weapon? And how many can I use?

I'm struggling deciding what to aim for at Lvl 3 for druid subclass, I'm leaning towards the Circle of Stars (fits in with far traveller nicely) or Circle of Moon? What would you recommend? 

I want to be able to go into battles without worrying whilst also having the ability to support my team and cast spells. 
One idea I had being a goliath druid was also changing into large animals (I read you can turn into dinosaurs if you encounter them??!) 
And the other would be Circle of the Star and turning into a big bright stormy goliath (idk I think that'd look sick) 

My ideas for cantrips are druidscraft and either produce flame or guidance. What do guys think would be better flame or guidance?
My ideas for spells are healing word, entangle, thunderwave and goodberry. Happy for any suggestions

Lastly my ability stats are more heavily on wisdom and strength, with intelligence being my lowest at 8 and my dexterity at 10. Is this still playable ability points for druids?

I'm not sure if I'm missing anything eep, anyways thank you so much for the read!  I'd really love to hear your opinions and suggestions :)

Zagga :))

Such great tips!! Thanks so much

I know that we're using the 2024 handbook but maybe my DM likes the 2014 backgrounds more? Cause that's what they sent to me :) 

I'm leaning more towards the Circle of Stars, but I think I'll talk to the group and make that decision a bit later. Good to know it has more versatility, I think that's what I'd rather right now.... turning into a big animal is pretty enticing though.

Awesome, I'll check in to see if anyone else has guidance and go from there, if they do I'll go produce flame. 

And finally, I'll move around some ability points to bump up dexterity, I think to 12?

Again, thanks so much!