Step 1: Install NodeJS.
Step 2: Install Angular.
npm install -g @angular/cli
Step 3: Create new app. I have created an app named my-app. You can use any app name. Get into your app directory. During creation it asks for Router and Styles. If you don't know about router select N for now. For styles, if you don't know about SCSS, SASS or LESS, use CSS.
ng new my-app cd my-app
Step 4: Serve your app. Your app will be served at localhost:4200. If port 4200 is busy, Allow angular to use another port.