how to create/know if your art/post is worth like... hundred thousand views yearly, regularly? its value?

i dont wanna do days of fan art only to know it wont sell, or that the styling bringsa down the theme or so on so forth?

i wanna be able to appraise my CONCEPT before working/posting... how can i do that? so to help my art channel get clouts....

seems like something experienced/succesful artist hases that brings their success....otherwise all hard work can go to dirt