maybe start out with some AFTERMARKET one-piece bars (yes i know that ultra pros come with 1 pieces.) im tall too (6'4") and i ride my bars 22 high by 18 wide. the thing about getting aftermarket bars are that you get to chose your height and width. this makes a serious impact on the way you ride. there are tons of wheels to chose from but i recommend hot gluing your stock wheels first and then find some aftermarket wheels. here's a link to learn how to hot glue your wheels http://www.youtube.com/watch?v=8PhvwCv2CZU as for the tricks, try barspins, and 180's to fakie. try riding fakie for a while. eventually you'll get grinds, grabs, and combos. hoped this helped, and glad to have you in the scooter scene.
you seriously want people to hot glue their wheels? in the year 2010?
fail