Perhaps a larger pot, but not deeper.
Then allow the lowest branch, lowest branchlet to grow about 3 feet .
When you repot check your root distribution, about 4 to 6 going around the trunk, but not like a bicycle wheel, look for some personality.
Should be fine and then you can recheck for the second branch maybe 6 months to a year later, and allow that to lenthen.
What height do you envision ?
How tall is presently?
Quite beautiful already.
With foliage ?
Good Day
Anthony