How to get into creating custom content?

I've been searching for hours on the internet trying to find tutorials on how to create cc for the sims 4, specifically hair (both maxis match and alpha but alpha mostly) I've found a few tutorials but I haven't found any good ones that really go into depth and create the kind of cc I want to create. Does anyone have any advice or any tutorials they'd recommend (doesn't need to be video)? I've started learning the basics of blender and sims 4 studio but I still haven't been able to create something successfully. Anyways, any help would be appreciated thank you!