Beginner Help

Hello, I know there is a lot of material on this forum, but I just want to make sure I get the right things. My idea is to get an Ardusimple board, which I understand comes with a GPS antenna already. I want to achieve 20cm accuracy, at least that’s my goal right now. So, I need an Ardusimple board, some kind of Windows tablet like a Panasonic FZ G1?

Go through each item in the table of contents. It lays out what you will need and some recommendations on where to get it.