Hi ross,
It all depends on the nodes that you can see on the trunk. If there are not enough nodes at the current trunk, you can cut it at 1' /20 cm and let the tree grow a new trunk.
If the trunk has enough nodes, it is then a game of pruning and patience. You can do it, it may take some time. Look at the apple trees on your picture. Those are not young either .
When a branch develops at the right place, guide it to the right position. If a branch develops in between positions that are interesting for you, just cut it.
The first step is to have the trunk raise the proper height. Then cut the top bud, and watch the tree shoot branches and guide or remove them.
Good luck !
Do you have pics of the tree ?