Hey Sodayaka, I have a solution for you that you may not have thought of. Me and a few artist friends of mine got the idea to begin creating something called residual income for ourselves and it has been going great. We can do our art and take jobs that we like and MOVE ON with our careers in directions we want because of the money coming in. It wouldnt serve it justice to explain it all here.. so just send me a note if youre interested, and we can talk about it more personally a bit further. Im here to help you the whole way too.
saw your gallery. if youre a sophomore in highschool and youre at that caliber... Id say you got about 2 years to push your art to the next level. then maybe you can land a job in design or something. Good luck.
Don't rush your choices. You are still young, and you're probably going to change a lot over the next few years. If you decide on a path now it might not be the right one, so just live your life for now and figure out what you really want to do when you get older.
Don't even worry about your career now, you have so many years that even if you find something you are dead set in, life will have a habit of happening on its own. If anything just try to figure yourself out, if you can do that, then later it'll be easier to find what you want to do out.
I have a secure but a bit boring job and do photography, writing and illustrations in my free time. Works for me, because I don't have the drive to become a pro artist. (And I absolutely don't want to be a starving artist. Living from you art is difficult.)