Review on Mcbazel White 3D Replacement Joystick Analog Thumb Stick For Nintendo Switch/Switch OLED Joy-Con, Tool Kit With +&Y-Screwdriver, Pry Tool And Tweezer For Switch Lite & Joycon Controller by Jeff Driscoll

The kit comes with some high quality tools, which was kind of surprising. I was able to disassemble most of it from their video, but they skip removing the tiny ribbon cables. I used an IFixIt video to show how these mini connectors work - you have to pop up the non-white part gently with the tweezers. Then press it back down after inserting the new ribbon cable. Since it only took a max of 15 minutes and works fine, I think it's doable for patient people. I have repaired phones before, however, so if you aren't comfortable with mini electronics maybe do the free mail in Nintendo route instead.