It's possible. I never did any of my own repairs, and have no idea what got done when they did happen.
I didn't know I had magic until I was around 16. At that point it pretty much just started spilling out of me, and I could just feel something there. I had a whole lot of help, practice, and learning theory before anyone taught me how to really tap into it. Now it's just always there. But I've also been blocked from it a few times. Death and anger were really good motivators to find it again.