I went through a similar period where I felt like I was wasting my time at college for a degree that I didn't need for getting into REI. I went to a big college for a semester before transferring to a local college so I could live at home and save money. If I were you, I would look at my options as far as online classes that would allow you to have more free time to work. A full 15-credit hour semester took me 30+ hours a week going to lectures, doing homework, and studying. I started doing as many online classes as possible and found that the coursework of a 15-credit hour semester online only took a few hours a week and could all be knocked out in one day.
I've flipped a few houses while in college and doing online classes has helped so much. I have all week to do real estate stuff and then on Sundays I get all my schoolwork done.
I would advise against dropping out of college to try and start REI. Getting into investing is very hard and takes a lot of time. It's important to do as much learning as you can. I think you should be able to find a way to schedule classes so that you are still able to work and get your degree.
Feel free to message me if you want to hear more about how I got started.