I'm afraid I'm a bit more optimistic than the other posters. I too have read Cave and Cosmos and have met the author. I don't believe Michael Harner would expect you to keep at it for that long to achieve a result! I have produced podcasts with my target audience specifically the beginner (www.makingconnectionswithin.com)--they are free; maybe they will help. In your post I found it exciting that you are actually seeing things, and more than that, that you saw an animal that was friendly to you! In my experiences I have come to believe that the spirits want to see that you are genuinely dedicated to getting in touch with them, because it is a serious relationship you will be developing.
Hope this helps.