This gives you all the info you need: http://forums.thesims.com/en_US/discussion/770609/member-or-new-member-everything-you-need-to-know#latest
If you are a new member, you can't start a new thread. This was a recent change due to some massive spam bot attacks.
You have to be a full member.
Engage in some existing ones first to level up, then you can open your own.
I'm sorry, at what level/points/etc. do you need in order to post a discussion? I had a question about lots with the new terrain features. It says in the help center that you need to have 50 points and 30 posts, but to create a post, how many points do I need? Are posts and discussions the same thing?
