Firstly what shape are you planning? Is it going to be a stand alone tree in the middle of the garden, or fan trained against a wall? Mine are trained against a south facing wall using guide wires. The wall really helps ripen the fruit also the tree takes up less room! If you decide on a fan technique, put some guide wires on the wall, then tie the 2 leaders in, the one going straight up, tie it so it's under slight tension going away at the same angle as the other leader. Over time gradually bring the straight one to same angle as the other. Then slowly begin pulling both down towards the horizontal. In the meantime you should find new buds begin shooting, with some carefully pruning and tying in, you should be able to create an 8 - 10' horizontal (from the original 2 leaders) with a vertical branch every foot or so, each of which is maybe 6-8 feet long all producing fruit! Bear in mind this is something that will take years to achieve, but on completion, will look stunning a provide a great crop year on year. Good luck!