Find yourself friends and a project. When I was your age, best thing I managed to do was to help a friend create a small graphing-calculator in Java? It was fun, we learned a ton and as he already was doing odd-jobs for his dad with Java EE I could have him both as a peer and a mentor.
And these days it is even simpler. There are cool projects on github! Some are even friendly to newcommers! You could dabble with videogames and do a jam on itch.io.
If you are aiming for an internship, you could research the sorts of companies you like, and find if they have cool projects/technologies you want to learn. I.e. I got internship at RedHat over 10 years ago and as I was already i.e. using Fedora and writing for a local linux website, we did click with the interviewer quite well.
And these days it is even simpler. There are cool projects on github! Some are even friendly to newcommers! You could dabble with videogames and do a jam on itch.io.
If you are aiming for an internship, you could research the sorts of companies you like, and find if they have cool projects/technologies you want to learn. I.e. I got internship at RedHat over 10 years ago and as I was already i.e. using Fedora and writing for a local linux website, we did click with the interviewer quite well.