Looking To Start Learning Shamanism, Where to start? Options

I just recently became very interested in Shamanism
I don't really know anything about it, but I'd like to be more connected with nature. I also would like to learn Astral Projection which I have been trying to learn for a couple months now, and from the little bit I've read it seems there's a lot of OBE stuff going on with Shamanism

I was wondering what are a couple good books to start me off?
I've only read a little bit of Shaman, Healer, Sage by Alberto Villoldo

I think my animal totem is trying to contact me. I've seen the owl 4 times now in less than a week. Owls are very rare where I live, the last time I saw one was years ago, found a sleeping baby perched on a plastic snow shovel right outside my door.

But the first contact was over the weekend, I was just sitting in my room when I heard an owl hooting(?) in the trees in my front yard. I went outside but couldn't see it in the trees as it was around 11 pm. After a couple minutes I saw a white owl quickly fly off the tree and back behind my house.
The next day I was sitting in my friends house, around 3 pm broad daylight, and I heard an owl in the tree RIGHT outside his window.
That same day I went into a bookstore, while I was waiting in line I realized there was a calender on the wall with the image of an owl for April.
A day passed without any owl sightings, then last night, I was thinking about the owl while watching tv, thinking to myself how it could just be a coincidence. Right at the same time I was thinking this I noticed a little plastic owl behind the guy on tv (IMG:style_emoticons/default/smile.gif)

Not sure if this is significant, but the day before I saw the first owl I left tobacco offerings for the spirits in the area that I've been spending time.
I just put an owl figurine in my room, not sure what it's supposed to do but I read somewhere that having images of your totem animal around you is good.

I'll try journeying to the Lower World but I'm not sure how successful I'll be considering I can't yet astral project, although I'm making good progress.