How big do you want it to be?
For that size pot, I think it is too tall. On the other hand trunk is quite small still and jades do not reduce leaf size all that good. I would put the plant in a bigger pot, let grow wild until decent size trunk. Then trim back for a final design somewere in the range of 30-50 cm high. A few years work on ramification and after that I would consider it ready for bonsai pot again.
But that is just me. What do you want the tree to be? You are the artist and it is your tree.
Btw....is that plant potted in sphagnum? Not good, jades are desert plants and hates constant wet substrate.