Hi!
So, you could
root it, or up can see if there are any suckers and graft a branch to a sucker. That way you get the right root stock. Also, cherry seeds seem to grow well
enough from seed when stratified. We got like 3-4 trees from a bag of store bought cherries we ate last year. You could grow out some seedlings and if you don't like the flavor of the fruit, then you can graft a branch. As for timing, I don't remember hearing a timing issue with rooting if you're still in spring. Once they have
roots though, I would think you
should ensure the clones go through that dormant cycle on time so they don't get "confused" and get burned when they have to deal with winter. Growing too much can make them sensitive to winter. You could put them in a semi cold place, if you are worried the winter might be too harsh for the younguns. Or, heel them in the ground and wintering cloth/straw/branches. Just my thoughts.