Need advice

Hey everyone, I was studying java and I think I grasped enough knowledge from it, such as algorithms, apis, gui, and concurrency (threads). So I want to move to the next language to learn, I am struggling from choosing python or c++ because I'm interested in pc applications and game industry but also in A.I, what's your advice, which should I choose, or should I move to a different thing such as newteorking and ethical hacking. The other problem is that I don't have the motivatation to learn new things especially this is my summer break from university, I want to learn things with someone, build simple projects together, if interested let me know (edited)