This website is open for viewing to the general public. As such, you should not post any personal phone numbers on the website.
Anyone may view the pages on the website. However, in order to post a message, you must join the website. This does NOT make you a PWP member, just a website member.
If you received an email from the website manager or another member, it will tell you to "click here" to join the website. That should make you automatically a member of the website.
To post messages, go to the message board (such as general), and click on New Discussion. It will let you put in a headline, and a body message. At the bottom, it tells you to click when you are finished. To reply to a message, go to the message. Near the top, there is a place to click on "reply". That will set you up in a message box to post your reply. If you are a not a member, it will tell you how to join the website.