To start with DO NOTHING! Bonsai is an art requiring a lot of patience and now is your chance to start developing that patience. The first thing that needs to happen is that you and your tree need to get to know each other.
I looked back and you had a series of posts about "my first juniper bonsai" at the end of last year. It was a different one. Do you still have that one? How is it doing? At that point you indicated that you understood that junipers need to live outdoors. Did you just bring this one in for the picture? Even though you live in Vancouver and it may be cold, it needs to go out. If it has been in for awhile, I would transition it gradually, to the coldest spot in your house and then to some unheated indoor space like a garage or shed, and then to the most protected outdoor space you can find. But I would get it outside, or there is a good chance it won't make it to spring, or if it does, having not had the winter dormant period, it will be exhausted and die when spring growth comes.
Other than that the tree needs to get used to its new (outdoor) location and you need to learn how to keep it alive and thriving in its tiny pot. In the meantime you can be studying the tree and the art of bonsai and thinking about what you want to do with it come spring.
The first step is what style you envision for it. Here's a couple descriptions of bonsai styles:http://www.bonsaiempire.com/origin/bonsai-styleshttp://www.bonsai4me.com/Basics/Basics_ ... Forms.html
It looks like whoever started your tree had in mind a slant style or possibly informal upright. It might possibly be developed into semi cascade or windswept styles.
Your tree is currently very twiggy. You will need to reduce some of that for your design to be clearer.
Here's some articles about basic principles of bonsai design:https://www.evergreengardenworks.com/rules.htmhttp://www.cutebonsaitree.com/branch-rules.htmlhttp://www.annarborbonsaisociety.org/im ... _Wikle.pdfhttp://andyrutledge.com/book/content/towardart.html
Best wishes! Keep us posted on how your new juniper progresses and what you decide to do with it in the spring.