You should be practicing now, putting in all those hours of study and practice that I keep talking about.
Music school won't give you anything more than you know if you aren't putting in the time on your own. You don't learn how to play things by osmosis. You HAVE TO put aside anything that distracts you and pick up your instrument and study, beginning with the simple stuff and then moving on from there.
You should be drilling on scales and chords and playing with a metronome for hours until you can do this stuff in your sleep.
Really, that's what it takes if you want to be a pro-level musician. Even then, being good doesn't mean that you're going to make money or a living at playing music.
I know a LOT of great musicians who don't make a dime off of music for all kinds of reasons.
Dedication, sacrifice, hard work...do all that and you MIGHT have a shot, but it's not a sure bet at all.
Regardless, you can learn everything you need for free as many other musicians have, but you've got to be willing to put in the time.