There are a few great places to start your self-publishing career.  I have used Draft2Digital and Amazon’s KDP.  I like them both and started with KDP (Kindle Direct Publishing.)  I added Draft2Digital when I wanted to publish on Scribd.  Scribd is like the Netflix of reading.  KDP won’t get you there, but Draft2Digital does.  If you are like me and want to get your books in front of the most readers, you need to publish on at least both of these platforms.