Autoflower madness

It’s best to keep your canopy full during the vegetative stage to capture as many photons as possible. So I would not trim if it is not needed. I like to expose my branches to more light by tucking down the big fan leaves covering them. This will help those branches grow faster. It looks like you’re about to be entering into the stretch phase of the plant. You can expect them to double if not triple in size in the coming weeks. It’s quite amazing how much they grow once they start to flower. So all your growth you are looking for will happen soon. It looks like you are doing a great job and they are thriving so far. I hope this helps.