Ahh, the bootstrapping problem. To get known you need to be known already. That goes especially for social media. Can't boost your tiktok from your youtube, if your youtube is unknown and vice versa.
You have over 400 followers on a social media like platform. Some people might think, it is you who could give tips ;-)
Maybe, get seen where people would look. Are there many people watching asset videos on tiktok?
You could do some showcases on youtube of games that use your assets though. But see above. Are there many people looking for that kind of stuff on yt? For assets my guess would be, no. For games, probably.