What I would do is some serious bending of everything (the more jumbled up, the better, at this stage) and leave it grow freely in the filed or in a big, big pot for a few years.
Coming back from time to time just to make sure the wire doesn't bites too much into the wood, but for the rest basically leaving it alone.
Ofc, I know that can be hard if what you wanted is "a tree, now".