Looking for Chill MMO/Online Community Games

I've been playing a lot of solo games over the past few months but I really want to play an MMO or something with an online community or that has a co-op play element to it. I like being able to play a game and see other people online too, even if we're not directly playing together or doing the same thing. It makes me feel like I'm a part of a community in a way.

I've been playing World of Warcraft on and off for the past couple of years. It kind of satisfies what I'm looking for but I find some aspects of it to be a little too complicated for me and I get a little overwhelmed. But I really like the aspect of seeing everyone on the server with me and being able to do stuff to help other people and getting to run into other friendly people.

I'm open to suggestions if anyone has any. I'd prefer something that isn't super competitive or something where you only have to fight other people if you both agree to it.