Hi Gyorgy,
Let me paraphrase your hints by the steps below:
1. I fork a new one from "master" as: https://github.com/thuanalg/poky
2. Add my new recipe into "meta-openembedded"
3. Send mail to the Admin about my recipe. If that which email? Khem Raj raj.khem@gmail.com?
Best regards,
Thuan Nguyen Thai