Book update

Five weeks ago, I sent my completed proposal and polished chapter to an editor who had expressed an interest in it. I haven't heard anything and I've essentially lost hope for that outcome. I know, with fiction manuscripts, it can be months before a response comes back, but I have been told that things are much quicker with non-fiction proposals. So, what's next? I'm going to rework the proposal a little and look into getting an agent.

Problem of the day: One part of the proposal that I need to improve is the biography, which should be approximately the same text that will be used on the book's dust jacket. I have a really lame biography. I have no relevant credentials or experience and no publications. Even claiming I've been interested in mammoths for a long time is a bit of a stretch. I have a small plastic mammoth that I've carried around since kindergarten, but mammoths have only been a big deal for me since around the time I started blogging ten years ago. I am confident that I know more about my topic--history of mammoth knowledge--but, how do I demonstrate my authority. Suggestions?