There are some similarities between us Mick, I'm 53 and have been playing disc golf for almost three years now but have played disc sports for over 30 years. What we lack in distance we have to make up in accuracy and wisdom.
The PDGA used to have some comments on the page that breaks down the divisions but seems to be gone now, one thing i loved was that they said us grandmasters pull all the trick shots out of the bag. Try to find ways to incorporate those years of experience with a disc onto the golf course.
Discraft's Challenger reminded me a lot of a regular old frisbee and I've been doing my best to learn to be accurate with it out to about 200ft, throwing both backhand and forehand. But I swear it's the 20-40ft range that causes me the most problems. I would definitely look for a putter you are comfortable with and practice, practice, practice.
But most important, have fun! We are a pretty laid back group and although competition drives us to get better, it's more important to have fun! Play a round with Kmont (the poster above) and you'll see what I mean. Looking forward to seeing you out on the course!