I am very new to PsA. I have been trying to find information on what the dx means.
Can anybody recommend places I can go to learn about this illness?
The book that sybil recommended is an excellent one. I would also encourage you to keep in mind that there is a really vast array of experiences, so recognize that not everything pertains to you. There's a major learning curve. Definitely ask questions that you are wondering about. Nothing is silly, since we've all been there, as newly diagnosed and wondering. You may want to post a bit about yourself in the new member discussion section.
PsA is different for everyone, and that's one of the challenges of the disease. It can also change for a person over time. The best thing to do is read a bit about the disease (sybil's recommendation is great) without obsessing about it (I say this because I have OCD and tend to obsess! LOL) and to ask questions.