How do i go about finding the free skins on rust, it comes up with nothing

Any of the skins not currently approved as shown in the Steam Workshop for Rust would be the "free" skins.

i get that but when i type in free it shows nothing

And you won't, as they are just unapproved plugins and are only "free" while unapproved; they are not specified as "free".

so if i type in unapproved will that give me them