AusBonsai

So I recently got an English Oak from a Nursery. It was a very straight trunk so I made the decision to trunk chop. It has bounced back with some really strong growth.
My question is... Should I be cutting off some of the excess branches now or should I be waiting? For scale, the trunk is about 2.5 CM tall where I cut it off and the trunk is about the circumference of a 5c coin.

From experience and past mistakes, I would cut the lower stuff you don't want sooner rather than later. That way you will have smaller wounds to heal.

Especially where you have multiple shoots coming from the one spot. These thicken quickly to create big ugly lumps at the base of the branches. Even on the branches you want to keep, cut the excess shoots off so you only have one branch coming from each spot.

Agree with Patmet - you could be a bit selective here in removing some of the cluster branching & letting the tree divert it's energy into the ones you want to keep growing stronger. It may want to re-shoot again from the places you remove the unwanted branches, but just keep rubbing these baby shoots off from the trunk. Have fun with it.