We would like to pull those who attended a group for the first time within a certain time period in order to use email/SMS for a welcome communication. We manually input group attendance each week. The "First Visit" attribute returns no results so I assume this attribute is based on using check in? If so, is there a way to pull a "First Visit" for those attending a specific small group for the first time?

Our ultimate goal is to create a workflow which automates this process, using communication templates. Thanks!