I have only flown my Tiny Whoop drones. I don't even have a upgraded receiver module for my EACHINE EV200D goggles.

I am going to get either 2.4 or a 5.8Ghz video receiver, Or i am going to get DJI V2 FPV Goggles.

What are 4" drones using? Does 5.8Ghz Mean Analog or Digital?

I'm getting all mixed up.

2.4GHz and 5.8GHz is just the radio frequency band. Both analogue and digital makes use of both frequencies. The DJI FPV Goggles use the 5.8GHz digital frequency for the type of FPV quads we fly. If you are looking for quads that are compatible with the DJI FPV Goggles you need to be looking for quads that have an Air Unit or a Caddx Vista (Air Unit Lite) in them.