Welcome to the fun Jim, I'm 51, retired and love my big green truck. It's a fun project that comes in handy around our place.
The older stuff is pretty easy to work on, not a lot of "special tools" needed.
The people on here are very informative and helpful, some will make sure you have searched a hundred pages first (it helps a lot to just read, read, read).
Sometimes it's just finding the proper word for a good search... (for specific problems)
But for something to keep you busy, and feeling good about fixing something cool, this is a good place to be.
So, have fun and enjoy your retirement.