I just got my 2nd hair cut at home, this time I also went ahead and bought a cheapish Remington hair clipper with 8 guard sizes.
Size 6 on the sides and 8 on top worked just fine, mostly.
The final trimming involves a learning curve... one that my wife has not yet mastered.
I'm glad my hair grows fast because when my son saw the back of my head he laughed pretty hard for a while.
After seeing my results he is waiting for shops to open.