Can anyone guide me how to create Forum in the community. Is it possible to display in the Home Page.
It's the same as in 10.x: https://community.telligent.com/community/10/w/user-documentation/62045/how-do-i-create-an-application
You can list and navigate forums using the Thread List (to list threads in one or more forums) or Browse Forums (to list forums) widgets. You can list wikis using the Browse Wikis widget.