Absolute Newbie wants to build a sound s

Hello people!

So I want to start fulfilling my dream of building my own reggae sound system. I'm moving into a house with enough workspace in the garden ans basement soon so I wanna get this project going.
The problem is: I haven't got the slightest clue about anything PA related. I've been playing music acoustically all my life, i haven't even owned so much as a proper stereo (been traveling for most of my adult life).
I am a quick learner though and I really want to get into all the technical details.

So any help on where to start would be greatly appreciated. Any guides to start off with that teach me the basics of pa tech, how to read a blueprint, what exactly is ohm and how doea ot affect anything i do.

I'm a noob looking for help.

Much love

Vicarious

If you are going to play reggae you will need some scoops. How big of a system are you going to build?