Teens: Finding a hobby....?

All I do is sit around. some kids go to like, basketball practice or guitar lessons and stuff like that, but I have nothing. I've been trying to find something I really like doing for a very long time. In the past I've been, a ballerina for a year, a singer for 2 years, a violinist for 2 years, a hockey player for a while, a guitar player for a while, an artist my whole life [but i recently quit], and some others, but I haven't been able to keep with any of them because they got old. I'm really tired of wasting my mom's money on stuff that doesn't work out. For christmas, I'm getting a keyboard because I played piano a bit as a kid and I've been getting into it again, and I'm sure I want to do it. My parents will get me lessons and everything. But I'm still dreading the fact that it'll get old just like everything else did and it'll be a waste. Is there anything left?