Typst comes as a blank slate. You want to start with template, which defines things for you. The difference between LaTeX and Typst is that LaTeX wants you to

Typst comes as a blank slate. You want to start with template, which defines things for you. The difference between LaTeX and Typst is that LaTeX wants you to define a template with the "documentclass", if you want the same experience in Typst you want to setup typst with a template, there the headings will be defined for you already. >However I believe this functionality should be available in the typst core. You can trivially define headings in typst without using packages.