Could you please IF this tree and advise on its care? Many thanks.
It hard to see because of all the glare, but it could be a crabapple. They tend to seed themselves around. Plus the size of the leaves looks large in comparison to the hands. Cherry trees will also show up as volunteers, but their leaves are generally longer and slimmer than the crabapples.
Plant it where it has room to grow and you'll know for sure what you've got when it flowers and berries. Both species will want full or mostly sun and moist, not soggy, soil. You can apply a liquid fertilizer when you transplant it, but other than that no fertilizer is recommended. You can also mix a little organic amendment into the planting hole and surrounding area, but not much. Most of the soil should be the native soil in which the plant will be living.
See our website's Publications (then the Ornamental category) for a good short factsheet about planting trees and shrubs: http://extension.umd.edu/sites/default/files/_images/programs/hgic/Publications/HG24_Planting_tips_f...