I am a typical person who loves to fix his own stuff. I used to get my ass whooped as a kid for taking stuff apart. I normally managed to get everthing back together in working order. I joined the Navy got out after 10 years. During my time in the Navy I worked on eveything from F14's to MK48 Torpedo fire control systems.
I work on phones, tablets and build custom PC's. I have replaced broken screens on tons of phones. From the easy iPhone 4,5 to the hard like the Galaxy S6 Edge.
When it says it is difficult, they mean super hard. The screen is very thin and easy to crack. I had one of the guitar picks pop out and the screen cracked. So you I am out an extra $130 for a new screen. Not too big of a deal for me. The touch screen was dead anyway. I just used the black double sided tape to put the screen back on. I used a 1Tb Samsung 970 EVO SSD. Just make sure you have windows 10 install on a thumb drive.