Can i learn to dance?

After seeing step up 3 i have to say im inspired. And i know friends who dance and it wows me and i think if started it i would really have a passion for it. But the problem is most people start young and i have no backround in dance. Im talking hiphop and breakdance styles like in step up. But i am 15, so in 5-6 years can i develop as a dancer or will i have to give up hope because i didnt start young. I really want to do something with my life that will make others notice me and impress others. Not necceaarily for money in movies etc but as a hobby. I could dance 10-20+ hours a week. Plus right now im 180 pounds and i am 5'11 am i too tall or too heavy to. I know ill lose weight because Dance works up a sweat. And the last thing is could i learn off youtube for basic knowledge the first year or so while i shed some fat instead of taking lessons looking like a fool for not knowing much