join kafka contribution

[Xu Jianhai]

Hi:
    I am engineer from Bytedance, living in China. because of related job,
I wish join kafka community and make some contribution. but I can not know
how to kickstart. I try to resolve some ut, but I can not get response when
I comment "maybe I can try it", meaning no assignee for me. so what should
i do is a better solution?
thx.