Based on what I have seen in the forum. There are some Post that I will see some of the boards scared me to make comment, mostly Meta. Because I only see Sr/Hero/legendary members in that board.
You should not be scared by any ranks. Some have earned their ranks for knowledge, some only by simply being very old here (but not necessarily knowledgeable). Even newbies can ask or tell smart things, even legendary members can ask or tell stupid things and make mistakes.
And some of the threads I saw there are very good for me to at least make a comment but my fear is that, wether is is an offend to do so. So I want to know if I have restrictions on some of the boards to make posts and comments in the forum. And if there is please provide those boards for me so I will be properly guided.
As said there are no restrictions, just, if you create a topic, make sure you create it in the most suitable subforum, hence increasing the chance of being seen by relevant people (one example is that you better ask about mining in the Mining areas than in Beginners and Help).
Then... you should never fear of offending some. It's a free forum. Some get offended easy, some not at all, learn to care less about such things.
So as long as you are on topic, you don't repeat things already said and as long as you don't spam, .. you should be okay.