Avast: Magical Biohazard (TM) here, ready to kick ass and boot up Hammer (before it boots down on its own, again)! In all seriousness, hello! I'm a TF2 enthusiast, and a fan of custom levels and level design. Currently, I'm making a Capture the Flag map, which will hopefully be my first multiplayer release. Using my gathered knowledge since a few years back, I'm optimistic on the results! Although, in my opinion, TF2 is in a bad state with the current Casual Matchmaking system and all, I can see that the Community is still alive and kicking!
Welcome to the community. Don't worry, even if Valve completely breaks matchmaking, we have no plans to go anywhere. Can't wait to see your first map!