You will need to create your own opportunities. Simply taking courses in coding is not going to cut it. Take what you learned so far and apply it to something concrete. Studying Android? Build an app and put it in the market place. Blog about it. Get people to use it. You will soon discover larges gaps in your knowledge. Study those concepts on your own. You can't wait for a course to teach you.

You are in a difficult spot. It is not so much that younger developers are better, but developers that start young shows that they have passion, and are not simply chasing a paycheck. You need to prove that you are not only a competent developer but also that you are passionate about the field. Start reading ... A LOT.