User Groups in the Instructure Community are invite-only and are used for a specific region, group of users, or product testing initiative. If you have joined a user group through an invitation, you can find your user groups through the User Groups page or on the All Groups and Hubs page.
If you are interested in participating in a [product testing group], you can indicate your interest here [add link to interest page in product hub].
If you are interested in discussing a broader topic, such as developing with Instructure products, Accessibility in education tools, K-12 usage, and many other interest-based topics, you can learn how to find and participate in Interest Hubs in the Instructure Community.