Share 'Couple of questions'

1. I have created my network ( russianmaryland.ning.com), but it looks like it is in edit mode ( I see all edit buttons). What do I need to do to change it to published mode? 2. I do not see tabs on my network's pages. What do I need to change to display it? 3. I am a member of few networks that I am no longer interested to be a member. How do I cancel my membership in those networks?