I would love to see the building process.
And there is an audience on steemit but (as far as I experienced) you need to promote your blog - or get supportet by one of the big whales here.

If I were in your place, I would do it multi platform and not steemit exclusive. You can post a blog post on other sites (and link them) with almost no work. Also you could go for YouTube, dtube and instagram with some video content.