Firstly i'd reccomend your student union, or campus center for a bit of light game, generally full of freshers and they dont give you too mch of a hard time.

For looks, id say its not too important, it depends what style you like, or the type of game you run, find something thats in style and you feel comfortable in and youre already on your way to improving your game.

as for inner game, i have to recommend NLP, not the ross jeffries stuff, more the stuff that focuses on improving sales pitches, like 'introducing NLP' is pretty good , it talks a lot about presupposites and frames, itll help you create a better state of mind for you to get out there and be the best you can.

if you havent read much id suggest doing research on the mystery method or even niel strauss. itll give you some basics to work on, apart from that theres a lot of online resources and archives you can tap into for hints and tips

happy sarging

P