I was explaining to a friend how the wall clips work and I figured I'd post my explanation here in case it helps anyone else out.

Good explanation. One thing I'll add is regarding different controller mappings. I personally have aim/fire mapped to L1/R1 which I find better personally due to the shorter travel distance of L1 compared to L2. Also you can use the built in PS4 controller re-mapper. I know some will map aim to a face button. Whatever works for each person works.