Here's the
official Q-and-A thread for Melee. General technical stuff like tech rolling is asked there. Tech rolling is basically hitting L or R right before you hit the ground while holding a direction after you've been hit or are tumbling into the ground. What this does is cause your character to roll in the direction you choose the moment you touch the ground. It has different properties from your normal roll though, so be aware of that.
If you REALLY wanna ask about Leffen, you can get away with it in the
Melee Social Thread. People didn't like Leffen because he was abrasive on the boards, and had some personal issues with various members of both Swedish and international Melee communities, but I'm foggy on the details and probably shouldn't talk that much about it cuz I don't know ****.
And go ask people to play on the facebook group whenever you want lol, people will definitely be down to play if they have the time.