Ok thks for the answer. How can I do that? Upon wanting to create a new topic, I don't see the option for a self moderating topic.
I can see that other users already answered this, so no need for me to repeat what has already been said. But I would like to draw your attention to the post Z-tight wrote and the quote from theymos that he/she shared. If I understand the quote properly, tagged scammers (with this I assume he means users who have negative feedback) can't create self-moderated threads. Since you have two negative feedback to your name, I guess you belong to that group and it might not be possible for you to create self-moderated threads unless that functionality is now available to all forum members.
Here is the quote one more time:
The excluded sections are Meta (except for this topic), Scam Accusations, Important Announcements, and Auctions. Tagged scammers can't use this feature.