Hi, Amy! I also was diagnosed in January and new here too. I have been doing a lot of studying about fibromyalgia and would like to recommend 2 books to you.
The first is "Fibromyalgia, An Essential Guide for the Newly Diagnosed” by Claudia Craig Marek, Which takes you day by day and is very good explanations to help us understand what is happening in our bodies. Start with this one.
The second is “Fibromyalgia & Chronic Myofascial Pain, A Survival Manual” by Devin Starlanyl and Mary Ellen Copeland. It is a lot denser and more scientific. A slower read; some days I cannot as my brain fog just cannot understand the words. But a VERY good text and lots of helpful information.
I made a binder as she suggested, and even just getting organized with that and a notebook to journal has been helpful to my state of mind. I bought 3 sets of tabs because I thought of more sections I wanted to make. I also put a calendar to track symptoms and medications, and a pencil bag for markers and pens and scissors, because I can never find them when I need them 
and also that makes it portable for while I am sitting in waiting rooms.
I ordered both books from Amazon for about $20, I think, and about $20 at the drugstore for the binder and supplies.
The second thing I can offer has made a huge difference for me already, and may also help your osteoarthritis. 
Thanks to my massage therapist Joann, last Thursday night I had the best sleep in over a year. She recommended a heated mattress pad, which I purchased online from Sunbeam. I will try to upload a picture for your reference. I use the Preheat function while bathing, so the bed is warm when I get in, then reset to Low.
For the first time in a year, I do not wake every hour to turn over painfully to carefully rearrange myself in the bed. Except for that one getting up to the bathroom, I sleep all night. In the morning on waking, I am not as stiff and sore as accustomed. Marvelous.
If you can manage the expense, you should seriously try it. My husband did not want it on his side, so I bought Twin size and simply laid it out on top of our regular mattress pad and underneath the bottom sheet. $49.49 with free shipping and the best money I have spent since the books.
The most important thing I have learned is that this will not kill me or damage my body, which is a huge relief.
The next most important thing I have learned is that I can do things to help myself (rest, exercise, and proper food). All these I can actually control, which is empowering when my whole body is in revolt.
But the actual sleep has been a lifesaver. I hope you are able to have a heated mattress pad, also.
I will keep you in my prayers. R.
