Yes, since you are self-publishing, you own the rights so you can publish on more than one site. What do you mean by having it available online? If you are wanting to sell it through amazon.com or something like that, you may need to go through a self-publisher or the site you're using may offer such a package. You will likely have to go through a self-publsher to publish on Kindle as I don't believe Amazon works directly with individual publishers. You can find out some information from my hub, Self-Publishing 101. Hope this helps.