Is it possible to make a collection? Or is there some sort of default (All of Blahname's maps) collection? I'd like to shove all mine together as I build them, just so they'd all be in one place for people to stumble upon, but I don't know how, or even if it's possible.

Thanks in advance!

All your maps are already under your workshop. If someone wants to see all of your maps, they will visit there.
I believe that there is no feature to add different folders etc. to organise different maps you have made with the editor. Is that what you were after?

If you go to the main Workshop page (not the one for your files, but the general one) there's a big green button on the right that says 'Create Collection'. You can add your own maps or any maps that are in your Favourites.