Please help me. I want to post a new topic but I am not sure if it has been discussed as a topic or not. Is there a way that I can find out to save the imbarrassment of posting something that is already being discussed????

Hit the "search" button at the top of your screen. You can either use the Google search at the bottom (easier, but harder to sort through the results) or follow the instructions for the integrated boolean search.

I try to use the search facility but I'm not too good at it

I would suggest that you run search for matches in thread posts rather than looking for thread titles. (You'll see the option when you click on 'Search')

Thank you, Banshee and Pisky. I did not see the search until now.