>>4210694Realistically? Burn out.
Even art school, where students enter with some experience, takes 4 years of fairly intense study to get to entry level competence.
Master artists in the past usually reached their peak in a decade. Some faster than others, but that's genius level like Michelangelo.
You? I would bet if you did something more reasonable, like 10-20 hours a week of solid study and practice, and taking breaks to recharge your batteries, could get a good, solid grasp of the fundamentals in a year. Especially if you're in a school environment.
The one thing nobody knows, is if you have any aptitude, talent, or passion for doing anything with any skills you may pick up. Some people just aren't cut out to be an artist, and there's no way for anyone to know ahead of time.