Greetings from Portland Oregon
I'm in my late 60's and new to bicycling. Took a Senior Biking class at the park bureau last summer (where we rode recumbent trikes). Once I was comfortable with the gears and the hand brakes, I tried two-wheeling on my husband's Townie. I've ridden it around my neighborhood many times, without fall off.
Now I'm thinking about getting a bike of my own because his is really too big for me. I don't intend to ride on the streets (at not until I get a lot more experienced!), so I'll be looking for something that's easy to get into and out of my mini van. I plan to take it to one of the many off-street trails in the Portland area.