Tree Breeding 101:
1. Find a large open space, ideally without trees anywhere near
2. Choose two different trees to cross. To get to cherry, start with oak + birch
3. Plant 5-6 of each type in a lose group in your large open space
4. Craft a scoop and go out whacking beehives until you have 4-5 combs and princesses
5. Craft 4-5 bee houses, place them among your tree cluster, fill them with bees
6. Wait and keep re-cycling the bees so they can pollinate leaves. Meanwhile, craft one spectacles and multiple grafters
7. Wear the spectacles to make pollinated leaves light up on the trees. Break the pollinated leaves with a grafter.
8. Rinse and repeat until you get at least one silver lime sapling, you can ignore all the other saplings
9. Plant the silver lime sapling, grow it with bonemeal, and harvest a large amount of saplings from it using grafters
10. Remove your current breeding trees and set up new ones using the saplings you just farmed. Try oak + silver lime
11. Always remember to be patient and do other stuff while your bees work. Tree breeding is a background process that takes time
Alternatively: don't like bees? Check the link in my signature!