How Did You Get So Good at Writing Generic Code?

How did you get so good at writing this type of generic code? I talk with a lot of people who are like, i like typescript, but once i get into generics, my head just explodes. It was immensely intimidating to me when i set out to build zod two years ago. Having access to some of these tools unlocks things in terms of how you're able to implement,. even things like, you know, form validation or whatever.