TMOBILE SIDEKICK!?!?!?!?!?!?

ok....i just got a tmobile sidekick and im pretty much clueless. i had switched from a nokia 5300 a much more self explanitory phone. ok so i put my sim card and memory card into my new phone. all of the songs i downloaded went into my media player. but i cant figure out how to change the ringtone to a song......can u? if anyone has one of these phones please i need help!!!!!! bad!!!!!! oh and btw i dont have internet on it. but i dont know if that makes a difference. and anything else about this phone u think is helpful please tell me!!!! like i said i need lots of help!!! thank u.TMOBILE SIDEKICK!?!?!?!?!?!?hey i have this phone too. i love it but i also hate it. u CANNOT put your music on a ringtone.(i know it sucks) the only way u can put music on for a ring tone is if u download it off the download catlog at the firt lil buble on the phone. good luck finding a song that you like though. there not very good. good luck! hope i helped