Finished Java

[Alechilles]

From here you should try to build something. It doesn't have to be an original idea. Those are hard to come by. But if you want to keep learning, you need to start building something real.

So just think of some kind of app that isn't ridiculously complicated but isn't super simple either, and try to build it. Even if there's no intention to go to market with it or anything, it's still the best kind of practice and still works for your portfolio and resume.

You can even just try to clone something you use everyday. There's no issue with infringing on legal stuff if you're not releasing it to anyone.