As another commenter proposed, try getting a course book and going through it at your own pace. With your newfound determination and interest it wouldn't surprise me if you stuck with it this time.
Alternatively, if you prefer putting vector math into immediate practice, fields like graphics and game dev use it a LOT.
I've got them under my thumb now, and thank you! I've managed to muddle through linear and develop an ECS and prove it's in linear space and enough discrete to be pleasantly surprised by Noam Chomsky's many lives.
I used them as examples of when I transitioned back to CS and had to learn what to learn before I could learn. So to speak.
Anything on your own learning journey you'd like to share?
