What exactly does RedM change?

Hello dear community, I would like to learn something about RedM before I try to set up a server.

Unfortunately, I have not been able to find out anywhere what RedM can do.
If all this is already written somewhere, please give me a link.

Is it possible to tame and keep wild horses?
Can you put more horses in the camp?
Is it even possible to occupy a house and set it up as a camp?
Are more houses accessible and usable, so that you can go to the theater and the like?
Is it possible to trade items like meat with the others? Or maybe even the dollars?
Will the missions of the NPCs be preserved?
How does it differ from the official Red Dead Online?

I have so many more questions, but this would be the first one, I hope there is a list somewhere.

Sorry for my bad English, but I’m working with a translator.