Hey there Nøire!
Just wanted to pop-in and say hi. 
All of the helpful resources for finding people to play with, and communities to join, have already been posted by some of our regulars here.
The only other thing I’d add is to stop by the New/Returning Players section if there’s anything you’re confused about or need help with in the game. Many of the players who post in that section will be happy to provide advice, tips, help, or a pointer in the right direction. Though I suspect you’re fairly in the know already considering you mention Mythic+ in your post, but it’s a section that’s there if you need.
Have a nice day!