Learn TypeScript if you have a background in object-oriented languages| www.typescriptlang.org
Step one in learning TypeScript: The basic types.| www.typescriptlang.org
Learn how TypeScript extends JavaScript| www.typescriptlang.org
Learn TypeScript from scratch| www.typescriptlang.org
Learn TypeScript if you have a background in functional programming| www.typescriptlang.org