Thingiverse has a bunch, so does instructables.
Also there are lots of generators, like for boxes and gears.
Check out #3:
(Really check out all of it, good stuff in there.)
Also don’t rule out google as a source for projects:
https://www.google.com/search?q=laser+cutter+projects
And the old “inurl:svg” google image search trick:
https://www.google.com/search?q=dog+inurl:svg&tbm=isch
Then lastly I’d you’re still stuck come back here and ask more specifically. “Hey I’m trying to make or find a premade candle lantern design that is Halloween themed, anyone got any pointers?” will probably get you all sorts of practical tips.
The only caveat is that it’s against forum policies to ask someone for project files. If you see someone’s project and really like it you can ask them how they designed it or specific process questions but asking for the files is disallowed. For more info on forum policy:
https://community.glowforge.com/faq
Welcome! Looking forward to seeing what you make 