Powershell: inheritance and propagation on folders

Having some issues on understanding correctly inheritance and propagation. Maybe you guys can lend a hand…

I have C:SOMETHINGSOMEFOLDER. I dont care about that folder. At all. From what I see, it has inheritance enabled and Im gonna leave it that way.

Now, inside, Im going to create the folder C:SOMETHINGSOMEFOLDERUSER01 That folder IS going to have special permissions and anything I create inside USER01 (files and/or folders) will inheritance permissions from C:SOMETHINGSOMEFOLDERUSER01. How can I enable/set this in Powershell?

Im obviously not sure how to use SetAccessRuleProtection correctly so my apoligies