I want to add Microsoft Team"s to my account and use it in Outlook

You need a business subscription, not a personal Office 365 subscription.

https://support.microsoft.com/en-us/office/how-do-i-get-access-to-microsoft-teams-fc7f1634-abd3-4f26-a597-9df16e4ca65b?ui=en-us&rs=en-us&ad=us#bkmk_ihaveanoffice365subscription

With Teams access, you’ll be able to set up a Teams meeting from within Outlook (I hadn’t actually noticed that option before, but I checked and it’s there in the ribbon for a new invitation).

You can download and run Teams in a Mac. Not sure what you mean by ‘use it in Outlook’, they’re separate apps.