This video will show you how to enable mods for FallOut 4
very simple quick and easy, just follow along and hope this helps
To enable mods go to "Documents/My Games/Fallout 4"
Open Fallout4Prefs.ini with notepad/any text editor
Find Launcher (CTRL + F can help search for it)
below launcher type
bEnableFileSelection=1
save and close
Open Fallout4Custom.ini with any text editor
type in
[Archive]
bInvalidateOlderFiles=1
sResourceDataDirsFinal=
save and close