So as most folks are aware Tapas is host to comics and novels but some have "comics" dedicated to serve as art galleries (myself included). Thing it that's not quite what Tapas is for, though of course no ones really stopping anyone from doing so. That said I started to search around and among all the other sites one that stood out to me was Medibang's ArtStreet.
The layout for the most part is pretty decent, tagging seems good, I'm not to sure about visibility but there's contests and a ranking system to get community members active and engaged
I've had a page for a while and I'll be starting to post pretty soon. But I'm curious if there are any folks here who might be active on ArtStreet? Maybe have some tips for what's worked for you? The kind of content you've posted? Whatever feels relevant or helpful 
Feel free to drop links below and if you'd like to see my profile it's here:
https://medibang.com/u/Monobun/