Connie,
You get access to the classes as long as Online Card Classes is in business. The content is housed on their website. I have a class from 2011 and another from 2016 and I checked and I can still access them.
It's co-owned by Kristina Werner and Jennifer McGuire.
You can go back and take old classes, or watch the new one when it is convenient for you. I think it will be more fun to take this, current class when it's "live" as people will be chatting and posting in the gallery. Not actually "live" as in a FB Live, or Youtube Live where you can comment as the video is running. I believe I read that a new video will be posted each day around 9am.
Justine Hovey is also doing a class. Her's is free. If you join via her website you get some extra freebies.