I've been tempted to ask this question but I don't think it's on-topic: What source/media is reliable to share my art with, like deviant art, etc. Would this question be on-topic? Or should I just not ask it? 👀
No, that would be off-topic per our Help page on allowed topics.
(It would fall under service recommendations, and does not have a direct practical purpose. It's also quite broad, since, as it stands, no additional parameters are given.)
However, we have several questions here on Arts & Crafts Meta that are used to gather resources. These can be linked to in case users ask about them.
I've created a thread here on Meta to serve the same purpose for (questions on) finding platforms for sharing works of art and crafted items.