Tried use GIMP a few times, but the standards feels way too different from Photoshop.
Like basically everything.
I’m not a designer, but I use such tools once in a while to make some images, and GIMP is nearly impossible to use for me.
Currently I’m sticking with Photopea on browser.
Well, there is this:
https://photogimp.com/
Otherwise, I think the best way to go forward is just to watch tutorials and practice. I made the transition several years ago, and it helped to have the expectation similar to learning a new language. The more you accept that you will have to take it slow and look everything up at the beginning, the better your experience will be.
This link is not the real one! The download button on it is spam. https://github.com/Diolinux/PhotoGIMP