This seems really confusing, but thanks for the adviceFor OLL, just learn the sexy-move-based algorithms, at least to start. You should already know a sune/anti-sune that is relatively fast from 3x3. The Pi, U, and T cases are extremely easy. The H perm is only 5 moves. The L perm is the only arguably difficult one, and you should be able to learn that in a day.
For PBL, the adjacent u and diagonal u cases are just T and Y perms. diag/diag case is 3 simple moves and recognition is very easy. The other two are pretty easy to memorize if you just look at the moves you make rather than the notation. The adj/diag is R U' R then F2, then reverse the first 3 with R' U R'.
You already know 4 algs from 3x3, you can learn the olls in a few days, and the plls in a couple days.