Confused .org and .com

Hi,
I’ve just realized after my second post I’ve “SAVED DRAFT” can’t be found, that I was using WordPress.com rather ww.wp.xz.cn.

Now I’me confused how to start write post with .org.

Nedd guidance please.

Thanks,
Marthen W.

https://ww.wp.xz.cn/plugins/wordpress-beta-tester/