Posted 28 November 2010 - 11:44 AM
Yeah you're in the right place.
"Post" is when you put a response or start a new thread or topic. The nomenclature may change, but it's all the same. "Reply" means to post a response to someone else's thread. "Start a new topic" or "Start a new thread" is when you start a brand new topic that others can post replies to.
Every forum has rules on what is and is not acceptable. It is always a good idea to read over them, since you can get yourself banned if not careful. Things that are generally frowned upon among all boards are shameless advertising of a product or website, spamming (posting the same thing in multiple spots), asking for help but then never following up with a response (even if you were helped, it's nice to hear your results rather than pure silence), and asking questions that are covered in detail in the "stickies," the saved messages at the top of each board that never go away.