Show list of blogs on my site sort by Type

Hi there!
I've just installed the blogs type plugin and it works propely.

But I've a doubt: I've a travel website where each blog/site is a destination.
I would like to associate the country for each blog, like Rome (blog) will be in the blog type Italy.
ok, done, but how can I show the list of my blog divided by nation on a page of my site?

How can I assign a "blog type" to those blogs I've already created???

Thanks!