This belongs in the Site Discussion forum. Please make sure that your are posting topics in the correct forum. Now moving...
The first thing that I recommend is that new members read the forum rules. They can be found at the top of each forum. Most of it is common sense, but a few of them can be easily broken without knowing it. Another place that is good to look at is the "Help" option at the top right corner of the forums.
Secondly, I would watch what other users do. Observe how they post, what they post, and how other people react to them. This is what I did for a long time before I started posting for the first time, since I wanted to make sure that I would be on track.
Finally, if a new member doesn't know what to do, or doesn't know how to do something, they should ask for help. It is better to ask for help than to risk doing something that could break the rules of the forums or annoy other people.
Hope this is helpful.