While I have no ambitions wrt making writing and self publishing more than a hobby that pays enough to cover editing, cover art, web hosting and t-shirts for beta readers, there might still be some worth in my hobbyist experience.
One, every e-book publishing channels has its own distinct public. Don't tie yourself into a single channel. Smashers can help with pushing to a number of channels, and then there is Google play, but that one is a bit of a pain. For my speculative fiction novelettes, Amazon ended up being responsible for less than 5% of sales. I am currently working hard on a first Novel sized work, and decided recently to write my book out in the open here on steemit. Posting second or third draft chapters in order, giving Steemit a first view of my work while gathering some funds for future editing costs, etc. So far it's going quite OK. I wouldn't get to hung up about a paper version. Very few indie authors seem to have significant revenue streams from printed when compared to e-books. Sure, it's great to have something in print to hold and be proud off, but as source of income, just try out the different channels for e-books and don't discard Steemit being just marketing. Post your chapters, get us hooked, 40 chapters times a 0.05 upvote is about 1.99 as well and the royalties from Steemit sure are better than from Amazon.
Thank you for your advice @pibara :)