1- an education to better yourself, hone your talent, and surround yourself with good musicians. They will inspire you and expose you to ides you never thought of before.
2- to meet people who will network with you. As I tell anybody who wants to go to music school - half of what you go to school for is to impress your teachers, so get your act together before you go to school - don't expect to go to school and to be magically made into a genius.
I moved out to Los Angeles, thinking I was pretty hot, and got a cold bucket of water in the face the first week I was there- there are hundreds just like you in LA, and most of them are better than you are. Get used to it, but don't let it get you down. The breakthrough for me was the realization that there were only four things needed for success: 1- Be there on time and be focused. 2- Play the part beyond their expectations. 3- Be happy and friendly, and drama free. 4 - have ideas ready to go - lyrics, riffs, arranging, if asked.
You can luck out at your age and get in with some great musicians and form a band that goes to the top. But, at 17, you need to be showing your ideas and skills- recording, writing, etc., so, if you meet some other creative, you will have something to show him or her. You could be two days away from meeting the next John Lennon, but, if you don't have something to show him, then you'll miss out.
I will add one more piece of advice: View what you do as if it were a day job: spend 7 hours a day at it, divvied up into practice, writing, performance, and business, and fergawd'sake, do NOT ignore the business end of it. Getting buzzed & chillin' is all cool until it interferes with your progress and your music. The music scene may look like one big party to some, but it's not. Whatever you do, set musical goals and achieve them. Focus on those goals, and have faith in yourself, no matter if you decided to go back to school or not. find them and make them happen.
Tip: you are already ahead of the game - by understanding the position you are in, and being willing to ask more experienced musicians and take action, you are way down the road. You're doing good. Keep at it.