No, there is no official step by step tutorial for this, as it falls outside the scope of support (since these forum plugins/themes are not actually our products). If you don't have any coding experience you would find that installing a forum in a subdirectory is the easiest option, as it's essentially a separate WordPress installation with another theme on it. You can set up a
WordPress multisite network in order to allow a single login for your customers across the installations. Thanks.