A warning for anyone considering self publishing. There are a lot of hucksters out there.
There''s an old saying that "the people who made the most money during the California Gold Rush weren't the miners. It was the people who sold whiskey and shovels to the miners. The same is true in the world of self-publishing. There are a lot more bogus editors, hack graphic artists and rip-off book preparation and publishing services than there are independent authors making a good living from self-publishing. When you see people on here giving you stock advice and telling you that self-publishing is easy you just need to pay for an editor, buy your amazon ads and build your network, there's a 99% chance they're involved in those industries that prey on the aspirations of others and they are actively misrepresenting themselves on here.
Also remember that garbage sells. Harold Innis, who was a key theorist in the realm of communication theory and the inspiration for the work of Marshall McLuhan only sold a few thousand copies of his academic works in his lifetime. Max Brand was a millionaire in the 1930s.