Hi! If you're looking to get to know us all, try the Steam chatroom - it's not always mapping-related, but you'll get to know people more quickly than via the forums (some people don't even use the forums :v).
In the Events forum, Gamedays get announced weekly. Just follow the format the host (usually Sel) specifies, post early, and attend the gameday! You can also request a demo of your map (for reviewing the gameday at your own time) here.
If this is your first time logging in after the migration (Feb 8, 2022), you must reset your password to log in. Follow this guide if you're having trouble