I dont know how you could PM incorrectly unless you were maybe PM ing adminstration with randow questions. Look in the Forum FAQs for some questions you may have.
If you have several questions on the same topic you can post them on the same thread, this thread as stated in your subject line is about phoenix, so you should talk about phoenix in this thread.
For your guinea question you should post in the guinea section for the best responces.
If you want to share your personal info and background you should make a personal BYC page, click on MY Page at the top in the blue bar. And you can make your own page with info in it. If you want to can click under my name were it says View My BYC Page and see what I put in mine.
If you find certain people who seem to have a considerable amount of knowlegde on a particular breed/subject, you can PM them with questions and most everybody would be happy to answer.
But like I said, the rest of this thread should be about phoenix since that is what you started it as, here is the Phoenix thread that I started a while back, it would probaly be more appropriate for you to post your pics and phoenix questions there since this thread in bookmarked in a sticky for easy access and more people may leard from your questions.
https://www.backyardchickens.com/forum/viewtopic.php?id=273550&p=1 There are some knowledgable people in this thread who you can PM with questions too if you wish, but you may get more responces just posting there.
Welcome to BYC and good luck.