Photoshop Elements on Mac vs PC?

What specifically are you wondering about? I use Photoshop on both my PC and my MacBook. Although I haven't used it on my PC for nearly a year, because I can only run an older version on my PC due to lack of RAM.

It took a little while to get used to the different short cut codes, but now my muscle memory has kicked in, and I don't have to think about it.

I used Photoshop for over 15 years on a PC, no problems at all. I haven't found any difference in the performance or intuitiveness when I started using it on Mac, so hopefully you won't either, going the other way.

With the shortcut codes, it's really just getting used to the different keys, like using Command instead of CTRL, or Option instead of ALT etc. Well, the opposite for you! For example. to duplicate a layer you would do CTRL J on a PC and Command J on a Mac. To transform it's CTRL T on a PC and Command T on a Mac. Changing the Hue/Saturation is CTRL U on a PC and Command U on a Mac. Things like increasing or decreasing a brush size is the same for both.

There will be a list on the Adobe site.

Using iCloud on a PC is possible, but nowhere near as good as on a Mac. It's way clunky, but at least you'll be able to access your files if you've got internet access.