I would wait until spring before I did anything. In the meantime find out exactly what it is. Read up on the species. And read all you can for bonsai culture for it.
In other words look at it. Make sure you can keep it healthy. Get acquainted with each other.
I know it's hard in the beginning to not do something. Anything. But they say the first lesson in bonsai is patience.
Eheh, I've been looking at it patiently since the summer, and to be honest, it's not really the "I WANT TO DO SOMETHING TO IT", but more the "Is it better to do it this time of year?" and "What do I actually do, and how do I begin?". Because honestly, with my knowledge or lack of, combined with not really having a vision for the tree is what's consuming me. Right now I just want to know if I could get a shear and remove everything but the trunk, which is so short, and ONE of those two leaders, and how that would affect the tree. Honestly I've been searching a lot, but I see no examples of a tree like this, which is freaking weird for a conifer. Also, I find the trunk ending to remind me of Broom-style, but I don't wish to pursuit it, since my other bonsai is styled this way. What I'd really like to do though, would be making this tree into a Bunjingi or Literati but I don't know how to get there from what I have. And I don't think I will learn until I try and risk making mistakes, like cutting all branches except the leader, and leaving that with it's secondary branches and foliage.