I'm a very results oriented person. Doing shit for arbitrary numbers in class? Doesn't do anything for me, they're just numbers. However making something that I actually find useful will get me going. I used to take comp sci classes and know Java, even made a few shitty apps for class back in the day. However, I had a hard time sticking with it because we weren't really learning anything to make it immediately valuable. Could dick around in Php for weeks trying to build a website, but cannot focus for classes.
Anyways, my idea is to port PKHex, a popular open source Pokemon save editor. Someone made a port a few years ago, but it doesn't work with anything past Android 11, hasn't been updated in 2 years, and the dev expects you to build the app yourself. So making a new version for Android seems very interesting to me. Is it a good idea for a first 'big' project?
The reason is Google kept Android stuck on Java 6 syntax for so long that the community moved on. At the time, moving from Java to Kotlin was a huge deal and then Jetbrains made a good job in making the tools work flawlessly and with no performance penalties as everything is compiled to Java bytecode (besides the nice interoperability).
Now Java has been upgraded on Android but it was too late.