Here you can get the idea on how this works
https://steamcommunity.com/app/22380/discussions/0/37470847672922703/
I'd recommend you to get a mod manager, there's plenty of them out there, Mod Organiser, Fallout Mod Manager, Nexus Mod Manager etc.
With time you will understand how mods work, the file paths, esp. esm. bsa. and stuff
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- Kek: