Welcome to the forums Excelsior.
You seem to already know how to create a new topic on the forums, as you created this thread, so basically do the same again. If you are looking to create an art thread, please make sure you keep you work confined to one thread (two at the most). Any other non art threads just make sure you put them in the right place in the forums (The Pub, Writers Corner etc.)
As for posting a comment on a HOF picture, I don’t believe that comments are enabled on pictures in the Hall Of Fame, so it doesn’t look like it will be possible for you to comment on one. Sorry.
Anyway, please make sure you read the forum rules. Look forward to seeing more of you.