I just want to use the Membership plugin to send out email reminders

Hi. I just want to use the Membership plugin to send out email reminders before annual membership renewals. I have built a system to manage membership as the admin is doing most things manually. She want to have an automatic membership renewal email sent out the WP users. How would I use the Membership plugin to do this. I am getting caught up in the PDF as it is telling me to add payment gateways ect