Should I Continue Posting Dragon Princess Even If It's Gonna Be Published?

Okay, so I'm working on a book called Dragon Princess. It is gonna be a published book when it's finished, but for now I have the first chapter on qfeast. Should I post more? If so, how much should I post, for I still want people to buy it when it's published. If not, why not? Thanks. By the way, in case you are wondering I have put my other books on hold at the moment and am solely working on Dragon Princess. Sorry if that is a disappointment to some of you, but it is my personal favorite and want to publish it by the time I graduate High School if not sooner. If any of you are publishers out there, please message me. I'd love to hear your feedback from Dragon Princess and my other books as well. But don't let that dissuade you either if you are not a publisher for I still want your feedback too! Thanks. :)