The world is a big place, so it can be comforting to ask for advice before setting out. This is what the discussion forums are for.
The feed tab is for sharing quick links and videos etc but when you have a question or topic where you want to write more information or want a detailed answer the Discussions tab is where to do it. (Note: Some groups do not have a Discussions tab due to the nature of the group.)
The discussions are listed chronologically and clicking on a topic will jump into the conversation.