does apple have an alternative program to outlook?

iCloud Mail and Calendar.

iCloud: Set up iCloud Mail on your devices

Welcome to Calendar on Mac - Apple Support

And, if you require all the functions of Outlook, a Mac version of Outlook is included in Office 365:

https://products.office.com/en-us/buy/compare-microsoft-office-products-for-mac

The alternative is to use Mail, Contacts and Calender. Three separate apps that link to each other instead of one app that combines all three.