Antonio Asked, can I sign into two Gmail Accounts at once?

If you have multiple Google Accounts, you can sign in to more than one account at a time. That way, you can switch between accounts without signing out and back in again.

On your computer, sign in to Google. On the top right, select your profile image or initial. On the menu, choose Add account. Choose the account and log in. This keeps both accounts open and active but they have their own separate settings.

When you sign out of one account, you actually sign out of all your accounts on that browser.   Simply select your profile image or initial and select Sign Out.