Is the site just supposed to be for Experts in mental health to talk to each other, or is it supposed to be for people in general, experts and non-experts alike, to share experiences and information, insight & support?
A problem I note in the questions is that the majority seem to be self-help questions, which are a particularly dangerous breed of question:
A site for non-experts would certainly be different from Cognitive Sciences, but I don't believe it would be a good Stack Exchange site. Sharing experiences, insight and support is not what Stack Exchange is about; it's about good answers to solid questions.
I'd generally suggest that this proposal be closed this as a duplicate of Cognitive Sciences, a Beta site, but from the existing questions the topics I don't feel they'd be welcome (without significant reworking) on Cognitive Sciences, or on Stack Exchange in general.
The site as proposed is for experts to ask and respond, providing their insight on topics that affect the population as a whole. Of course, like every SE site, there will be questions and answers from people who are not experts, but the expectation is that the expert answers will pretty quickly be voted to the top.