Sorry to say, but what are you trying to sell? You cannot sell an open source project with just 50 posts and no real user base on any good platform. And not seeing what is the Android app either. At least you should list some paid/custom plugins.
I see that there are a lot of Categories on your site mostly with 0 posts. Why not concentrate on few; and organize healthy discussions. Ideally you should have some experts to answer any query. Else, you should get help in some way. You should really do something and get some content before you should sell it. And a lot of unrelated contents wont entertain users nor Google search. The smaller the domain, the more successful the Q2A will be IMHO.