Hero Help

[quote=proof89]Hi, I am new on the forums but have been playing for awhile. I played Yi for a long time once I got 20 I learned how to jungle. I have jungled on Yi and amumu. I have tanked on amumu alistar. I have played a lot of diffrent heros. I play with 2 other people and 2 random people most of the time. One of my firends play xin zho, brand, akili and the other friend plays sona, mf, and twitch. I am trying to figure out what role/hero I should be to help win more games and make sure I am using a hero good that I can keep using once I get 30 and start playing ranked games. Sorry if some spell/grammar is bad or if this is confusing. Any advise and so on would be nice thanks[/quote]