[PS1] Are there any tutorials on how to mod the OG RE Games?

[BioResidentSKG]

As what is mentioned in the title. I want to start modding the Resident Evil games and I think the perfect bridge into that is with the original three games, plus the Gun Survivor spin off. Texture ripping and modding should be the easiest thing to start off with but I can't seem to find any tools or tutorials on YouTube or anywhere else that can help me out.