I have set up a group mailing list with MailChimp, a service which allows me to create and send formatted messages to a large group. We currently (04/5/20) have 64 people subscribed to the mailings.
I've created a new page on this site, listed in the sidebar as "ONLINE STUDY GROUP." If you'd like to receive these weekly mailings, which contain a link to the study group sessions on Tuesday mornings, 10 AM to noon Pacific (USA) time, click that link in the sidebar. You will find a form you can use to subscribe to my email list.