Page misunderstanding

I have the basic WP working [newbie, sorry if this is a stupid question]. I then installed the s2Membership plugin – to turn the blog into a paid membership. That installed OK.
However, s2M should make its’ membership signin page the landing page, but I still get the same page as without the plugin.
I then went to “Pages” to set restrictions. All of the membership pages are listed, but not the page that is the WP landing page, so I can’t restrict it. In fact, none of the WP pages are listed, ONLY the pages created by s2M. Shouldn’t all pages be listed, not just ones created by a plugin?
How do I get this WP page listed under pages so I can set a restriction? Why isn’t it listed under pages automatically?
I do not understand this at all.