I had help with my truck from a retired body man, and he adjusted the doors for me. It didn't seem to be especially hard, but it does take some time and patience. There isn't a lot of room to play with, so they have to be right. One point you might keep in mind. The doors are made so that the side with the handle does stand out from the cab just a little in the area below the handle.
one of them would not catch on the second click on the latch. We finally figured out that the hook that goes over the latch on the frame was worn. I put just a tiny bit of weld with my MIG welder on the latch, ground it down to the proper shape, and it worked fine. Allen