Signing up is the first step of using the platform. The process is very easy and common for all kind of users.
If you are using a corporate Gsuite account or your personal Gmail, you should click on the "Sign up with Google" button and select your Google account.
To make sure you can access all apps, a Workplace admin needs to add you to the Workplace. If you have not signed up already, you should receive an email as shown below. You can click on the "Access WebApp" and signup in the Workplace directly.