I wanted to major in physics when I went to college in 2013 (I'm 28 now), but had to drop out and have flushed out a lot of information. A lot of basic concepts are still there, but I'd need a lot of refreshers going back to like algebra lol. I'd love to get back in to studying in my free time, but I've completely forgotten how. Khan academy is great, but any other advice for reteaching and retaining would be awesome!
Personally, I bit the bullet and went back to uni part time. Distance learning has come along way since covid, and means you can still hold a full time job.
Im now half way through second year of a management course, taking two or three papers a semester.