That stem project you're building is too raw. This message is going to seem extremely random and probably strange but I've been looking at the demo videos over, not sure if you're accepting any help or anyone to work on it but I would be down.
Immediately got ideas just from seeing it, target audiences, new features that could change the game. Honestly not sure how you got it to where it's at right now though man, whole thing just looks clean and fluid. And it's completely different than something like Pinterest or Canva but could be a real bridge for designers or creatives, even hobbyists.
Mind you I'm not an editor but I cooked up some things from the demo videos you had up already. Feel like the target audience to gain momentum for this initially would be like anyone who's on any mix of Grailed, Goat, StockX, Farfetch, Pinterest, Instagram, etc., but nowhere to cook real designs or just creative boards.
The main component that I felt was missing from your demo videos was music that matched the vision. (Correct me if I don't see the vision at all though)
Added some scrappy designs just to see if I was on the right track vision wise, unfortunately done on Canva.
Then just plain with the music, maybe it's just me but I feel like it adds life to the demos.
If you're willing to allow help on this though man I got ideas that would be pretty cool.
Also could get users to test this out and see what the actual target audience would think about it.
Also noticed that it has a library and a web search built in which is cool, how restricted is the web search feature? And could a user have their own asset library built up with folders or graphs to keep their workflow more organized?
And these were my genuine initial thoughts and ideas from seeing the demo alone: