Latest Outlook Calendar not working on Mac

Hi all, I recently got a MacBook Air and am having great trouble using Outlook. I have a Microsoft 365 subscription and was unable to use the Outlook Calendar (emails are fine). I got help from my local Mac Store, and they recommended I use Outlook Legacy, which now lets me use the Calendar, but it's really awful and outdated. We established that the current version of Outlook on Mac does not support POP or IMAP servers, which is why the newer version of Outlook is unable to sync the calendar or send meeting invitations. So, as I understand it, this is an issue that needs to be sorted out. My question now is: I see there is Outlook for Mac - should I download this, and will this be the solution? Please help!