AFAIK, there's only one person on these boards who broke into self-publishing and made a successful job of it. He mostly keeps to the main comic and board maintenance areas. The rest of us would be wildly guessing.

I will note that OotS got its start by putting up free material and making it accessible to a group already inclined to be fans. Likewise, Snowqueen's Icedragon was fairly active in a fanfic community that was itself fairly active.

So right now your choices are to try and make your novel highly visible to the sorts of people who might like the idea and hope for the best, or hope for your lucky break and then hope that the idea catches on. There's a reason aspiring writers are told not to quit their day jobs.