Yes, Cpython doesn’t have all the functionality with pyRevit like IronPython does. But back to the subject, did you restart the PC after changing the path?
And to add to the subject, I have been trying to install pywin32 also but there is some difficulty with packages that try to install other modules in themselves similar to the problem with Matplotlib I made some time ago here. So probably we’re at the same point, sorry I can’t help more than this. If someone could help us out 