bending the branches down wont make it look old, it will just look contrived. because its still a young tree, with a spindly long trunk and spindly branches. its poor material, but gotta start somewhere. also, the tree doesnt look in proportian because its too long and the canopy is too high. hastily bending everything down is a way to a quick, forced canopy, but it will never look right, just a quick fix.
google japanese maple, look at some good ones and study the proportians and you will begin to see why your tree will inevitably need shortening and probably bulking up either in a grow bed or training box.
actually, airlayering the trunk just under where it splits into two is a quicker way to a better more in proportian tree, it just makes sense.
this is what a natural twin trunk with some girth looks like