I have never done any electrical work at all before, but I watched about a dozen youtube videos to learn how to do it. The instructions that came with the light fixture were so unhelpful, it would have been less confusing if they gave NO instructions. Of course you need to be super careful and connect everything the correct way, but it wasn't too difficult. I had to stop a hundred times and check to make sure I was doing it right, but it wasn't hard.
Here is the youtube video from Home Mender that I found most helpful for my situation: https://youtu.be/SjXe8PFz0Cg
The main problem that I ran into was that the new light fixture was shorter than the previous one, so when I started to attach it to the wall, there was a gap on top AND bottom where you could see old paint and even a little bit into the electrical box. I knew I would need to repair the wall to cover those gaps, so I didn't attach the light fixture all the way yet. I got a drywall patching kit, cut 2 strips of patching and used spackle stuff that came with the kit to fix the wall. It dried in just a couple of hours, but I didn't get to finishing it right away. It was working and secured to the wall, just not totally bolted down.