Prerequisites
NodeJS ( https://nodejs.org/en/download/ )
NPM
Install Angular CLI
Install the Angular CLI using the npm
npm install -g @angular/cli
Create your first project
Invoke the following commands in command prompt
ng new my-first-project
my-first-project
is the name of project. When you run above command in command prompt , it will ask you few questions like below, after that the CLI installs the necessary Angular npm packages and other dependencies in a new workspace

Initial folder structure will look like below

Run your first project
Navigate to projects root directory
cd my-first-project
Use below command to run project
ng serve
The app will run in http://localhost:4200/
Your application is running now.
Output will look like below

Next : Angular project file structure