As I enter into this.......thread?.... I don't know where to write, what to write, or if I'm in the right direction. I am straight lost in something of this sort as I've never done something like this in my life. Very computer challenged.
Once you are accustomed to CardsChat you will find it as easy as anything else to find topics to create comments.
Here are a couple quick tips to finding topics (which may or may not help).
Look near the top of the page and you will find a heading 'All New Posts' - the list will contain a list of the most current topics of discussion. And most times you can hover your cursor over the heading and get a snapshot of what the first post may contain, where at that point you can decided if that is something you would like to comment on.
Another tip, simply go to the top of the page, click the 'Forum' tab and scroll down to the many sections and sub-sections where you may find a topic to comment on - always remember to read the first post of any thread, to know how to comment. If you look at the first post of this thread, the details there may help you as well.
It's a big site with a lot to look at, so take your time and be patient.