Help Developing a study course

Good day. I'm 23 years old and I've decided to try and use your website to catch myself up on my education. I fell behind in highschool because I chose to work full time instead of taking it seriously. I'm not sure what I want to do but I know that I would like to learn. I spend a lot of time listening to channels like CGPGrey and Kurezgesagt and would like to expand my education even further.

I am on the other hand a little overwhelmed with everything that I'm seeing. In high school I only took 3 years of actual literature classes and I never took anything beyond Algebra 2. I breezed through my science courses and pretty much all courses of study by passing the tests and quickly forgetting all the information that I had memorized.

I want to take the SAT and go to college but I don't even know where to begin. My education is so far out of date even after a mere 5 years that it's hard to know how to properly educate myself to prepare for college. I'm excellent in all courses of study should I choose to apply myself I just need help finding a path to follow.

Any help, suggestions or advice would be greatly appreciated. Thank you so much to anyone who takes the time to read this. I hope you have a swell day.