Since I have a Mac and the instructions are basically the same on a PC I am going to give instructions on how to login your Beta Google Account on your computer
1-Open System Preferences
2-Open Internet Accounts
3-Click on Google if it shows up. If you do not see the Google image, find a "+" and click it.
4-Enter your Beta Credentials and click Sign In
5-You will see a screen that says "OS X would like to", on the bottom of the screen, click Accept
6-Select the services you'd like to use and click Done
Your mail, contacts, notes, and calendar events are now synced with your computer.