I am not sure if I need to build a separate website, but I have created a FORUM using WordPress and I would like people to be able to "join" the forum easily so that they can contribute and discuss the articles. Here is an example of a website that is similar to what I want to do http://www.momnbaby.com/. My question is: can I do this type of thing with WordPress (maybe a custom theme using my own hosted domain) or do I need to get the whole thing built and hosted and just have the blog as an extra?
I really appreciate any assistance - I am hoping to attract many thousands of users in the future so I need to get it right and I have so far found WordPress very easy to use.
The blog I need help with is changingwomen.wordpress.com.