You can talk to the foremost mango growers on cultivating mango trees and learn everything there is to know about making mangoes. You can consult with the best chefs about how to make the best mango dishes and desserts and learn the absolute best way to prepare and eat mangoes. You can learn from the masters of how to paint a mango so lifelike that you'd think the painting was real. Etc. You can learn and truly master everything surrounding the act of eating a mango.
But until you sink your teeth into a mango and actually eat it, you've no idea what you're talking about.
So, until you actually have the kid, all this worrying is for naught.
You will be just fine, the kid will be just fine (they have their own agency too, you know), the world will keep turning and you have the agency to put a person in it and teach them what they need to know.
The real question is if you want to eat a mango or not.