Hello Dave. Its really hard to say what kind of ride you should get. I have a moped, and I love it to death (now that it runs). I also ride a '80 Honda Passport, which is a much more smooth, comfortable ride. The passport is 70 cc, and has 3 gears, blinkers, and room for 2 (dont get me wrong, you can ride 2 people on a moped, but it takes a LOOOONG time to pick up speed).
I am also restoring a 79 Vespa p200e. If is surprisingly easy to work on, and parts are easy to come by. (The older your scooter/moped is, the harder it will be to find parts). Since you are retired and mechanicly inclined, I would encourage you to get a Vespa or Lambretta and fix it up after you get a moped. Mopeds are a great first rung on the ladder, but they are just that - the bottom rung, and if you are like me, after awhile you are going to want more power and style.
But it is up to you! I guarantee that whatever you are looking for, there is a moped or scooter perfectly suited for your needs.