Tommy, Have you ever heard of upper structure triads? They are really useful for remembering these chords - for example 7b9#11b13 can be thought of as (in C) as C7 with a d major triad on top.

Usually the are all major triads you can build on ....

Dominant:

When using dominant chords build on …
2nd = C13 #11
b3rd = C7#9
b5 = C7b9 #11 (or flat 5)
Built on the sixth C13b9
Built on flat 6th = C7#9b13+


Major 7th chords
Build on 2nd = C9#4 (with 6th) can be used for sixth chords.
Can be built on the 5th gives a 9th chord


I find this very useful as it builds exotic chords on what your muscle memory already knows

Minor chords

Built on minor 7th gives a C79/11
Build a minor triad built on 2 gives the above chord with a 6th)

Win 11 64, Asus Rog Strix z390 mobo, 64 gig RAM, 8700k