When you log into Wargamevault, look at the very bottom of the page, and click on "How to sell on WargameVault". This is the start of setting up your publishing venture.
You'll need to follow their guidelines for PDF and/otr print, as far as what kind of PDF they want, how to set up your illustrations, etc.
Then it is a case of writing good advertising copy to get people to look at your books, and hopefully buy them.
Wargame vault takes a percentage of the take on each title sold, but it frees you up from the "I forgot to send this guy his PDF and now he's smearing me all across the wargame world".
Printing is done by a Print-on-demand contractor, and they print and ship the book to the buyer without you having to do anything.
you can set it up to get a Paypal deposit every month, which is nice and easy.