well, what i was doing was taking what was downloaded and putting it into a newly created folder. Then i would Add File from that folder, but when the file isnt a .esp, it won't even show up
Use Add archive, not Add File. It'll open the archive, look for an Omod Creation Data folder, import that if it exists, or if not it'll let you fill in that information manually. Give it at least a title that matches the mod, then click Create Omod. It'll take the contents of the archive and make an omod out of it.