@YooperHill thank you for your post.
It is very easy to join a Unity Hub.
Go to a hub, for example: https://www.snailmailfriends.com/unity-hub-details?id=1-pocket-letter-lovers
And press "Join this hub".
If you want to create your own (every user can create up to 8 hubs) press "Create your own hub".
When creating your Unity Hub, you can select either international or regional. The international (global) option opens your Hub to members from all countries, allowing you to connect with a wide-ranging community. However, if you'd like to connect with members in a more specific location, you can opt for the regional option. With this choice, you can choose up to three countries, and only members from those countries will be able to join your Hub. This allows you to connect with individuals who share similar interests and are situated in a specific area.
View all hubs here: https://www.snailmailfriends.com/view-unity-hubs?view=all&mode=list&sorting=new&status=active&page=1