My big theme will be - we learn best by project based learning, especially if I don't have to learn for the sake of school or a job

Project based learning is the best way for me to retain knowledge

I was thinking of learning math, and by doing a project like the light projection art, this is really the way for me to learn math and let it stick! It's sort of like how the people who program games learn their algorithms the best of all versus people who do algorithms just for leetcode and job interviews