Practice makes perfect. I’ve been using it probably weekly (sometimes daily) for almost 3 years and solved hundreds of different Questions. I’m also a coder, so Typst code is pretty cool to work with, automate stuff, etc. With enough enthusiasm, perseverance, practice, and time you can become just as good.
Though Setting up headers in Touying - #3 by Andrew isn’t actually that advanced or anything, just gotta figure out how to work with a rather complex library. The docs are pretty good now.
There are some that are known and probably useful to some, like About - Typst Examples Book. But I don’t know much and GitHub - qjcg/awesome-typst: Awesome Typst Links · GitHub doesn’t have anything else.
Oh, right, there actually is something else. And this one I can recommend because I’m the co-author and because it can be useful or just interesting to almost anyone, probably. A paper about Typst, written in Typst, and with an official Typst-based template in the IJIMAI journal