If you're really young, like younger than 13, then you should probably stay away from the forums, or at least stay away from the lounge. Other than the fact that this is mostly an adult website, young people tend to screw up by posting too much or being stupid. If you do go into the lounge then you should lurk for a little bit first to get what the general protocols are for behaving before you join in a conversation. You seem to be doing fine in regards to the forums, but you can never be too careful!
You said in the top post that you were sensitive or something along the lines of that, so maybe before you publish your storygame you can get a feel for how others receive your writing by posting an excerpt of it. A lot of times young authors post a whole story that isn't the greatest and then get their feelings hurt by comments posted on it. People here aren't afraid to tear something apart if they want to, so if that kind of thing bothers you then maybe posting a story here wouldn't be the best choice. If you post a story and it gets unpublished, don't republish it again. Go over it and make adjustments before you publish it, and then you can try to re-publish it.
I think that you will fit in fine around here if you just keep doing what you are doing and don't bother any important people. If you aren't that young and just said that because you are in your early twenties or something, then you really don't need to worry. If you are really young,(guessing from your writing that you are) then you ARE probably younger than most. Don’t worry about it though because I’m very young and I do just fine, as do some others.
Anyways, welcome! :)