A little step in another direction. I am at your age and have a similar riding background. Until last year I stayed as far away from the park as I could - old and frightened
But when riding with my sons I had to try the park and it wasn't fun just to ride through it without testing. But my old board (Custom X) was to long and to stiff for the park.
So for this year a bought a Salomon Drift Rocker with Salomon Rhythm bindings. So much fun, both in the park and outside. It isn't a board for high speed but it has all other fun stuff: Easy to press, easy to turn, superlight combo which helps me to make 180/360.
Since I like to try new thing and develop my skills this was a step in right direction and I believe that this has made me a better boarder all over the mountain.
And now I can ride with my sons and push their and mine skills.
-- Better to have tried and failed and not tried at all --