Everyone has different preferences when it comes to bikes. I love bicycles, am 63 y.o. and own four, and ride them all. My most comfortable bike, is the Giant Suede cruiser, it is 7 speed with slightly forward crank and big cushy saddle, very easy, comfortable and safe to ride.
I have a vintage Schwinn Traveler 3-speed - this one seems harder on my legs and knees, but I still love it.
I own an older Sedona DX 24 speed comfort hybrid - this one is more complex and tricky to ride and designed for roads or trails. It does NOT have a forward crank, it is traditional bicycle geometry.
Lastly, I do have a small Schwinn folder which I hardly ever ride, I received it as a present for if I wanted to take it with me in my little convertible to a park or beach, etc.
One should really go to a bike shop and ride a few and get their recommendations before you purchase to see what feels comfortable to YOU. And definitely buy from a bike shop, do not make the mistake of purchasing from Walmart, etc. It might be a little cheaper, but in the long run it is not worth it.
Bike riding is one of the most fun exercises you can do - I am an addict, started riding about 10 years ago and never looked back!