I used to fix phones back in the dumbphone days. Other than needing a special screwdriver, it was extremely straightforward as long as you were careful with the ribbon cables. I guess I don't have anything to add, lol, I was just reminiscing.
I actually still have two of the tiny torx screwdrivers I used to use. They're magic because they seem to fit about every tiny random device I've needed to disassemble and I've had them for 17 years without losing them.