I'm New And I Need Help Please

Hello everyone,

I'm JokerMonde9 and I have played GTA5 a lot since almost 5 years, but only on consoles. Now I have got a new pc that is quite good (ryzen 5 4600 , RTX2060, 16GB), and I dowloaded gta 5 on the Epic Games Store, because it was free and I took it. Now, on my new pc, I started playing but I know every single bush in this game because I played so much hours before, so I wanted to try Mods. LSPDFR seems to be the best of all, as I saw on different youtube vids, but I need some tips to install it. I have watched many videos about the installation, but I still haven't got a clue what I have to do because I don't really know how to manage files, I have never done such things. I kinda scared me to go into directories, and to delete manually or move files from a location to another one, I think that I will mess up everything in my game and I won't even be able to play it lol, or even be banned for some reason from gta online because I didn't know how to prevent having mods in online. I don't want to use mods in online, I think that it's not cool to bother new players like me, who don't necessairly have mods.

If somebody could tell me how to proceed, and I saw on some videos that it would double the size of my actual game, which I don't want if it is possible to avoid it.

Thanks for answering, and sorry if I made mistakes writing this, english isn't my mother tongue.
I hope it was clear, and have a nice day !!!