I'm also trying to find some free time to contribute to some open source projects. It's not hassling but I just want to give back to the community—who gave me the career and many awesome tools already.

Getting into contributing is not easy, I have to admit. It's like you're having a second job and no one has the dedicated resources to help you understand the internal architecture. All you can do is submitting the bugs, questions, pull requests and hope for the best.