Help With Multisites

Backstory: When I first hosted my site, I was very green and had no idea what I was doing. I write stories, and I thought it would be cool to make each story its own site so people could subscribe and get updates for only the stories they read. So, I enabled multisites and made them all subdirectories. However, all of the posts were named like this: domain.com/blog/thepost. In my settings, I had links to be named domain.com/thepost. I saw domain.com/blog/thepost as an option, but of course it wasn’t selected. I didn’t want this because I had a page named domain.com/blog which contains different content from everything else. Also, it broke all existing links.

Concern: I turned off multisites because my host provider said /blog was just the way it worked. Now I am back to the point where I would like my stories to be on separate sites, but I know that because this is not a new installation my only choice is to have subdomains instead of subdirectories which is perfectly fine by me.

Questions: If I enable multisites, will all my links contain that “/blog” in them? If so, I’m guessing the links will end up like this: story.domain.com/blog/thepost. If that is the case, I could do domain mapping so all the old links (on the top level) get pointed to the appropriate places on the subdomain?