Hi @Sarah Bowden8
You can do this via Sequence email8 under the paid plan.
When you create an email sequence, you would decide the flow of that sequence using rules or filters; You can do this using Automations. You can determine who would receive the emails you would like to send it. I recommend you look closely into these links and the other relevant automation links.
How to Automatically Tag Subscribers9
How To Begin A Visual Automation6
The tutorial above would show you all the possibilities you can work with to make sure the emails are sent to those only you would want them to.