You are such a strong person, learning how to knit with all of the other stuff going on! I have a fairly mild case of fibromyalgia and I am so thankful because I could be so much worse.
AS far as your knitting goes, I think it will all get better and you will understand it more the more you practice. You will get your tension straightened out too. I have been using bambee needles and I love them!
Keep on practicing!!