I've read their documentation many times, and never found any of it clear. Quite the contrary, I've found the docs very hard to navigate and learn from. Maybe this is just me though? They always seem to have a lot of documentation, but all of which just assumes you understand what other terms mean, or how complicated things behave without actually pointing you to where you could learn such things.
To further this, to get a "good looking" Hugo site going I find myself going through shared hugo projects and pulling various features together in my project - a process that requires a fair amount of trial and error and plenty of frustrations. I haven't tried Jekyll, and I still think Hugo is a great project, but it didn't leave me with a fully satisfied experience such that my next static site will try out something else. I'm also a full-time go developer fwiw.
I still use it, but it’s not exactly beginner friendly.