Welcome Maple,
It sounds like you've put some work into your game. What books have you read. what are your basic beliefs about how to play poker?

btw, you may or may not find full NL tables more profitable. Short tables aren't "safer" in my opinion. They're more agressive. But you should experiment. Some people play better short handed, others play better at a full table. The fact that you made 1st in the MTT is pretty promising for your play. And the fact that you're here is very promising for your future.

Welcome.