Yes, pruning the tree this year would be beneficial, but in this case you do not need to aim for having a central leader. (In fact, most stone fruits are deliberately maintained without one, for better light exposure for the canopy and good airflow through the leaves and fruit.) This location might be a bit snug for a 'Stella' cherry, depending on how dwarf it is due to grafting, but in either case, try to trim the current branch tips back by about a quarter or third of their length, so the tree is closer to about 8 feet tall when you're done. That will encourage the tree to start producing more branches, which will then be fruiting age the following year.

Don't prune now, as it's still a bit too early and could risk infection of the wood. Instead, wait until the buds have begun to swell and open (closer to mid- or late March, likely) or up until the flower petals are falling off. If the tree doesn't have flower buds and does not bloom this spring, then you can time the pruning to just around the time the leaves start to expand.

Miri

Hi Miri, 

You're welcome!