Hi Brenda - I too have no idea how to get single spacing. I've tried many times when I have a list type format. I honestly, don't think you can single space it, unless you write in paragraphs.
My only suggestion, would be keep going. I just started as well, had pretty much no views and traction. Then a random story that I didn't really think would do well, just took off for some reason. Now, I'm starting to get some traction.
So, just keep going and something will take off eventually.