This tutorial from Mariya Davydova at FreeCodeCamp covers the essentials of setting up a development environment, getting ready to package your code with Webpack and TypeScript and then dives into creating a game. The game, called Starfall, is kept simple on purpose, but still introduces the core concepts of using Phaser and TypeScript, so is well worth reading by anyone starting out on this journey.
How to Build a Simple Game in TypeScript
Start with setting up a dev environment and moving to coding a game in TypeScript in this beginners tutorial.