How simple for an idiot to set up Batocera on a Mini PC?

First off, what sort of Mini PC? I just threw in "batocera on mini pc" in to Google. I figured there's no point in going as low as you can possibly go so somewhere in the middle to top end is where you should aim for. I came to something like this. As I understand it that's on the more expensive side of things, possibly overkill? Or not?

Anyway I want you to focus on the bit in the title that says for an idiot - that's me.

I was recently looking at the WiiU & Homebrew. The universal way of thinking seems to be don't look at YouTube, only go off some guide write up.

We all cope differently & personally I find it much easier to follow a video guide than a text one. The worst part about text write ups is they'll often say select [something] yet that something doesn't even appear on the screen & so then you're stuck. Or they throw in a heap of jargon & I'm just like WTF? Where a video is just watch me & copy what I do.

So is it just a simple case of find a good YouTube guide & copy them or is there more to it than that?

I understand acquiring ROMs will be a separate thing (as in I suspect that wont be part of any Batocera/Mini PC setup due to piracy issues) but is that the only separate thing?

What I'd like to avoid is buying a Mini PC & then finding out I needed to do XYZ. Or putting Batocera on there but then finding out I need to do ABC yet there's no guide for that & it's all hush hush kind of thing.