In the center of your Homepage you will find the latest updates from your communities.
On the right side, you will find your Profile Card
On the left you will see useful links and reminders.
To access your Communities, navigate to Communities>My Communities in the navigation bar. To see which communities you are able to join, navigate to Communities>All Communities.
Click on the community you want to access, this will take you to the Community Home. This will show you an overview of the activity happening in that community.
From here you can see recent activities and navigate to Discussions/Threads, Library, Events, or Members. Not every community will utilize all features, but these are four key ones to checkout.