Hello, Sumbloke -- a belated welcome from the U.S. (Oregon)!
You have already received excellent information and advice from other members of this forum, but I wanted to add my bit. At first a suspicion of and then a diagnosis of PD can, indeed, be depressing. And it takes a while to work through the period of mourning for your lost health. But it does get better! Once you reach a point of acceptance, you can begin the fight bettyblue refers to.
For most of us this is a slowly progressing disease. (My case is particularly slow: I've had PD 18 years and am still living the same life I always did.) The right combination of medications will counteract your symptoms, probably much better than you now think. In addition, a program of regular and vigorous exercise will do wonders for keeping you strong and supple. We're told that optimism and laughter help, too, aiding in the production of dopamine.
It is hard to see beyond the illness or its symptoms initially, but most pwp who fight against it do have some degree of success for years. Your symptoms sound very much like my first signs of PD, which began at age 51, though I was not diagnosed officially until 56. So maybe you will be as fortunate as I have been and will find the meds that work for you. Bets of luck!