Once you log in to the Azure Management Portal, click on the + icon or the + New label, as shown in the following screenshot. This will guide you to create any services/resources currently available in Microsoft Azure:

This will open a panel on the right side with a list of available resource categories from the Azure Marketplace. Select the one that you want to create. In our case, as we are going to create our website, we will select Web + Mobile from the list:

Once you select Web + Mobile, it will open another panel on the right side with a list of featured apps. This includes Web App (for websites), Mobile App (for secure and scalable mobile backends), Logic App (for automated access and use of data), CDN (for global distributed edge servers), Media Services (to encode, store and stream audio/video), and more.

As we are going to create a website, let's click the featured app titled Web App. This will open another new panel on the right of the screen:

On the Web App screen, the wizard will ask you to input a few details. Enter a name of the application. Make sure that it is globally unique, as it's going to create a sub-domain with the same name under azurewebsites.net.

Select the subscription model that you are going to use. In your case, it would be different than the one shown in the preceding screenshot.

Then select the Create new radio button to create a new Resource Group. Give it a proper name. Generally, it's going to create the resource group with the same name as the application.