i've finally managed to air layer a branch off a japanese maple growing in my yard which I plan to bonsai. It has been in the ground for about 8 months now and the trunk is about 5cm thick and the new tree is about 2.5m high. Do I treat this like a collected tree where I leave it alone for several years to recover or can I begin working on it?
it is starting to come out of dormancy with little pink flower buds forming on some of the branches. Would a trunk chop be the best method of starting and if so, how high do I chop it. The lowest set of branches are little less than 1m high - should i gradually prune it so the tree doesn't go into shock or just lop it off under the first branches?
Btw I was planning on making it an informal upright style - shall post pictures soon

thanks in advance,
Xanthe