Im 17 live in uk want to live in usa?

I lived in the US for 20 years and take it from me, you are in the greatest country on the planet. The grass is always greener on the other side... Any problems that you have here will follow you over there. Teach yourself how to play guitar, there are a million or more videos on youtube that can show you how. I started with guitar, now I play drums... all self taught... Find some people in the United States with similar interests online, build a relationship with them. In the meantime start putting money away for your flight. You can stay for 6 months, but finding work legally will be a problem. Finding illegal work is backbreaking hard work usually taken by Mexicans and South Americans who are very good at what they do. Study will be extremely expensive, even applying costs money. It's not impossible, so if you really want to do it you can. I believe you can do anything you put your mind to. It will be hard work. It's not what you know, it's who you know. Buddy up with some Yanks, maybe even a girl. Get married to one and then you can stay as long as you like...