Hi
This video is explaining the concepts and installations that you will require to start your work in Angular
All the concepts are explained in a very concise manner. Let me know in the comments if detailed explanations are required
References
1. AngularJs Prerequisites only requires you the understand HTML, CSS and Javascript nothing more
2. Node.js Installation - https://nodejs.org/en/download/
3. Angular CLI installation doc - https://angular.io/guide/setup-local
4. Typescript in 5 minutes - https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes.html
5. Observer design pattern - https://sourcemaking.com/design_patterns/observer
6. RxJS API - https://rxjs-dev.firebaseapp.com/api
7. RxJS Guide - https://www.learnrxjs.io/