Welcome to the SMD forum!
It's all about self-discipline. Nothing prevents you from studying by the same method as in college, I advise you to read about the method on https://www.quibblo.com/story/c5fi-H9i/Standardized-Learning-and-your-Career. It is important to understand the principles of your future profession and what is the goal. You can be successful without colleges, because it’s not about your diploma, but about your education. I am sure that you will be able to practice immediately and it will fill your hand. Good luck.