Guild Wars 2

I’m new ( 3 days ) of playing and i can’t decide between mesmer , guardian , thief and elementalist.. I’d like something not too complicated to play and something for WvW…THX

Those are all good choices. Mesmer is good for roaming in wvw but not running with 10 or more people.

Guardian is a front liner who provides a lot of boons (you can blast combo fields for allies) and had a lot of toughness/tanky builds whiel still doing damage.

Eles are on the same lines of guardian, where you can build for a tanky spec and run D/D or scepter/D, or be a back liner with a staff.

Thief is more of a roamer as well. If you zerg you can either go tanky and spin to win (dagger storm) in a zerg or pick off weaklings on the side of the opposing zerg. Spot a ranger pew pewing, stealth in, kill him, stomp, stealth out.

I would say if you don’t want something complicated than go with guardian. First ele and mesmer take a good amount of time before you will get the profession down. Guardian is probably one of if the the most forgiving class so its a good one to start out with and learn the basics of the game systems. Also the final choice depends on what your play style is. Do you like to run in the front and go head first in to your enemies, or do you like to support other people, or do you like to run by yourself. Would you rather call fire down from the sky and burn your foes or would you like to bash them off a cliff with a hammer. would you rather stab them in the back from the shadows or would you like you confuse them and destroy them that way.

Yeah, guardian sounds good for what you want.

maybe this link can help you. read it up and watch the video too. im new to gw2 but this thread help me alot.
https://forum-en.gw2archive.eu/forum/game/players/GW2-Combat-system-101-Guide/first

Guardian is better for your choice. It isn’t as complicated and has easy survivability if do it right.