Nice tree.
Based on my experience (hot summer with occasional rainfall, mild and dry winter), give it a nice hair cut. And water daily (natural habitat is rainforest-y). It will back bud from everywhere.
Once the budding starts, let a few of the lower shoots grow out to thicken the base (I see a little sucker growing out near your soil line, that one is perfect).
Keep the lower shoots long and keep trimming the upper branches. Dont worry. It wont die. This will promote ramification, decrease leaf size, and thicken the base at the same time. If you dont trim the top, you'll quickly end up with long, thin, ugly branches with dead twigs and leaves everywhere.
Wire branches when they start hardening, else you'll have branches that reach upwards, and look awkwardly semi-circular when you try to bring them down. Wire carefully, even a bit loosely, bark can basically rub off on these. Check for wire bite every 2 months, though in optimal conditions, scarring will basically disappear in a year due to it's ridiculous fast growing habit.
It's not eally cold hardy. Indoors in winter if temps drop close to or below freezing. Outdoors in full sun in summer. Water every 2-4 days in winter.
