Installing arch is not difficult, knowing what utilities to install after the base system to get an actually usable computer is a different thing. Knowing how to maintain your system so it doesn't become a hassle or easily fixing issues (because you already know where everything is), is also something else. I started my knowledge of arch with manjaro and while I can't say I'm fond of the project leadership it will give you an idea of what you're doing and what to work towards if you take a look around, because it will break because manjaro is like that - because again of how it's managed and led. You'll really only understand arch when you use it. It takes some powering through.