You can add multiple Google accounts on your Android device. However, it considers the first account you sign in with as the default and uses it to sign you in across various Google apps and services.

Swipe down from the top of the screen and tap the gear icon to open Settings. Tap Google under the Personal subheading. To change your password or add two-factor authentication, tap Sign-in & security ...

Now, Google will show you the Google accounts linked with your recovery email; select the one you want to use and enter the password to log into your account. That’s it.