I wanted to be an animator or storyboard/concept artist, specifically for 2D animation. Imagine the soul crushing realization that 2D was pretty damn dead in the United States. Things has gotten better as things mature up a bit but now I'm 28, not 16. Maybe I should've stuck on and be the change that I wanted to see but tell that to a reserve 16 years old me. Now I'll just support the industry with dosh. On a personal level, I'm going to explore cartooning and storyboard/concept art on my own pace and time.
Another reason why I got disinterested. Like sure, getting stuff like anatomy and perspective down is important. Exploring different techniques is great too, like how can a person work oil on canvas into this. Art classes felt like they were molding your style into something it is/was not, like how military boot camp mold you personality into something different. Beginner art classes has been described as boot camps but if it destroys what you think your style should be then it's kind of going against the spirit of art and self expression.
You should really consider doing cartooning or whatever on your own time. It's frustrating at times but it's fun.