I haven't had any problems installing and configuring software for the RPis in my systems, but then I am fairly computer literate. There are a number of places where you can get good instructions. To my mind, probably the hardest thing is choosing which of the many options available that you want to use. I currently use two different ones -- one player uses the HiFiBerry OS with their HAT card and is very simple to set up. The other two player use the PiCorePlayer OS which has more options and thus a bit more complicated. I use PCP on those two RPis because the players have touchscreen displays.
As noted, there are many other options available.
As noted, there are many other options available.