Hi Breanna,
Thanks for reaching out and for you interest in our products 🙂
With The Events Calendar and Events Calendar PRO you can create the weekly classes as recurring events and show them in the calendar.
We have Event Tickets and Event Tickets Plus which allow you to sell tickets for events, but there are a couple of limitations for your case: tickets are per-event and recurring events do not support tickets yet.
What I would suggest is you set up WooCommerce (or similar) in your site and sell the 6 classes pack as a regular product. Yo can include a link to the product from the calendar and/or single event pages. Does this sounds like something that might work for you?
Please let me know about it,
Best,
Nico
PS: @Ruby, we do not offer any courses! We sell a calendar plugin for WordPress.