IMHO, it is a question of do you want that chop scar to be grown over? If yes, let it everything above it grow. And/or, do you want the leader above to be thicker? If yes, let it grow.
Then come fall you can cut it back as it needed for putting it away for winter. Then next spring you can cut back to a pair of buds, once twice, maybe three times, to get back to the internode you want to keep. Then you ask yourself the same questions.
If you want to produce ramification, cut back to the leaf/visible-bud pair closest to the trunk (from which you want to have two branches from the one. Then let it grow until it seems to quit extending (around May and August), cut back and repeat.
The trunk below the chop will not thicken much until the leader above the chop is nearly as thick. The same is true for branches = let them grow until they are as thick as you want, the cut back.
You're doing great!
Keep having fun.