if you want upperclassmen to like you dont do any stupid pranks just lay low. the nail that sticks out gets hammered.
Oh and remember, dont skip class until your experienced enough to know when you can without missing out. Avoid people that do drugs, and drugs in general, I know i lost lots of friends to drugs and shit. do your fucking homework its important. be nice to everyone and always try and be friends with everyone, even if you dont like the way people act find good in them. Seriously, cant say this shit enough. and go to fucking class seriously