The typical EA intro program contains readings on longtermism, but it begins with & focuses on global health and wellbeing interventions.
Some people might come to your EA group specifically looking to learn more about longtermism; perhaps they read The Precipice and were inspired, or are particularly concerned about pandemic preparedness.
We've created a curriculum for a separate program that can be run either alongside or instead of the traditional EA intro syllabus. It was developed by Rani Martin.
Resources can be found here.