Parameters and Limits
Please find all the Google Workspace email hosting parameters on our dedicated page: Google Workspace: Business Email and Collaboration Tools.
As for the sending limits, group messages, and storage capacity, check the official article by Google: Gmail sending limits in Google Workspace.
There is no limit on the number of accounts you can purchase. To add mailboxes to your service, refer to this guide: How to Purchase Additional Google Workspace Mailboxes.
Google Workspace Free Trial
Google Workspace free trial allows you to explore the service without having to make a purchase.
This type of account offers limited resources – you may find more details here: Limits for trial accounts.