Android Development

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?