[andrewstuart2]

Also, check out all the free MIT OpenCourseWare CS classes. I listened/watched through a bunch of them a few times and then did some online exercises (leetcode, advent of code, hackerrank, et al) and it really helped me understand algorithms better and I also became a much better programmer for it.

I'd also suggest going through Network+ and Security+ study guides too. IDK if the certs are worth it because I haven't actually taken the tests, but the books alone taught me a ton of the important concepts at a high level.