You can see what iOS version you have by opening the Settings app and selecting General then About.
To start a new question thread using the iPad app, you go to the Forums tab at the bottom, choose Apple iPad Discussions, then choose iPad Help. Threre are a few sub-forums at the top. You should choose one of those if your question is about that subject. Otherwise, tap the icon at the top right (looks like a box with and arrow coming out of it), and chose New Thread.
Using the website is similar. You start by choosing Forum from the menu at the top. Once you have selected the forum you want to post in the + Post New Thread button is to the left just above the list of threads.
Feel free to explore the other forums, participate in the threads, and/or start a new one if you've got something to say that no one else is talking about. On the web site each forum has a brief description of what is supposed to go there. On the iPad you have to use common sense, though if you choose to look in the Stickies tab at the top of the thread list there is sometimes a post about the specific rules for that area.
Hope this helps.