Yes, you can post anywhere on here! I have a Yorkie Bichon mix (Yorkiechon), and have been more than welcome on here for years now. You'll meet some nice folks.
I mostly see Yorkie in mine too! Must be a dominant breed. When I went looking for a forum to become a member of, I chose YT because of that cuz I don't see much Bichon in her.
Sometimes I even post about my Shih Tzu and I'm still welcome!