I was a similar age and had a similar lifestyle that you have when diagnosed and that was 15 yrs ago Evonne.
My advice now? Sounds vain but I wish I'd met me 15 yrs ago so I could say "really it's not so bad do this, don't do that etc etc"
Bottom line is my life as a PWP is quite normal now really thanks to advances in medicine or more specifically DBS, I'm on practically no drugs now and can do just about anything again that I could do 15 yrs previously.
Be careful with all the drugs that your neuro prescribes to treat PD as you can (it doesn't always happen though) do things like get paranoid on them, develop delusions of grandeur eg think you're great at something you weren't before, have increased libido, get obsessive, blah blah.
Levodopa or more precisely Sinemet or Madopar will definitely help your symptoms and (for me anyway) was less likely to be the culprit for out of character behaviour.
No books I can recommend really, perhaps others can.
Lee