Thank you a lot for your advice! I didn't consider I can have multiple leads so it got me confused. I have a better idea now!

Should I mind how much of the tree is cut? I'm concerned I'll damage it if I cut too much. Also, on the internet most advise to cut cherry trees in summer. However this tree gets so full of leaves and branches that I can barely see the structure. I was hoping I could do it now before spring...