Deploying a template using portal is quite straight forward. Log into your Azure portal and create a new Resource groups by providing the name and location, and then selecting an appropriate Subscription:

After creating Resource group, the template deployment resource should be selected and either a template can be imported from the existing GitHub repository or a template can be authored from portal itself. You can paste the ARM template code we created earlier in this editor and save it:

After saving, select an appropriate Subscription, the Resource group we just created, and provide the value for the Storage Account Name parameter, then click on Purchase to deploy the template. You will also have to agree to the terms and conditions before you can deploy the template: