I wanna make a fallout new vegas quest mod but im not a very creative person so i need a story for the quest so any help will do and if i do do your idea i will give you full credit of the idea, and if anyone wants to help me make it feel free to post.

What kind of story do you want? A mystery, an adventure, a rescue, a faction? Have you looked at the other quest mods that are already out to see what kind of stories they have? Note, you don't have to install them, the description pages on the Nexus usually do a good job of at least introducing the story behind the mod.