I had that in the beginning too. Once you're used to the basics you'll find that most of what you've learnt does transfer though.
I think part of the problem, at least for me coming from 20 years on photoshop, was searching for "how do I do this advanced technique in GIMP" before learning the basic layout/structure/tools etc.
YMMV but I highly recommend watching an hour or two of an introductory GIMP course. It's what made it click for me.