After you have successfully completed the Beta Verification program, you will be automatically directed to the ‘Beta Profile Settings' page. Check the box for Heroes of the Storm under ‘Beta Tests I'm Interested In' on the right side of the page and click on ‘Update Preferences.
A notification will appear when your Beta Profile Settings Preferences have been successfully updated.
Launch your Battle.net desktop application. Log in with your details and check that your region is set to ‘Americas & Southeast Asia'. (If you don't have a Battle.net app, you can download [HERE])
Check that you have the Heroes of the Storm icon in the game list on the left hand side of the launcher. You can now launch the game by clicking on the ‘PLAY' button.