I'm hoping someone can advise me on how to "train" this young Chinese hawthorn tree to be a tree, if that makes sense. We got it and planted it as a small sapling this year so it's in its first or at most second year of growth. As you see from the pic, it is currently one stem and is about a metre high. I'd like it to branch out, not too low, so it's a small tree and not a bush that branches out from the very bottom. How do I prune to make this happen, and how do I ensure that the branching out happens at the right height and not right from the bottom?