The tree looks like a dwarf alberta spruce, and I agree with the others, they're kind of a pain. I worked on some years ago thinking I could go against the grain. By the time they get to this size (about the same I worked on), most foliage is way out on the tips, not the interior where it needs to be (as leatherback noted). Hard to get consistent back budding. Not saying they can't be turned into bonsai, but your efforts may be better spent with better material.