There are available of active communities on the internet for Tesla owners detailed below:
The Tesla owners group (unmoderated) is a place for open discussion on Tesla issues, both the good and the bad. The moderated equivalent work mode closely with Tesla however that has the downside of fairly strong moderation at times.
For a worldwide forum, or to tap into what the Americans are thinking, then the TMC web site is a good source of information. The US get their cars ahead of us so for the earliest real reports of the Model 3, months ahead of it arriving in the UK, or just insight into a software update a few days early, this is the place to go.