I want to use the same templates for every issue of my publication. Is there a way that I can save those pages so I don’t have to look for them each time?

Yes. When browsing templates, simply click “Bookmark This Page” at the top of the preview screen. MDO will save it for you in a section on the left called Bookmarks. You can go back to this section each time you are ready to start a new publication and the pages that you want will be there.