Artemis, I think classic or vintage is in the eye of the beholder. I picked up a Univega mountain bike at a garage sale and started riding with my son. I had been off of a bike for at least 25 years, save for a couple of years when I occasionally rode a low end $15 Gitane. I liked riding so much that I bought a new Trek hybrid. That lasted until a neighbor gave me an 80's vintage Giant road bike. After a couple of rides on the Giant, the Trek got parked and eventually sold. One thing led to another and I now have a garage full of vintage rides which I enjoy immensely!

The most important thing at this point is that you RIDE. Once you start riding you will figure out your preferences pretty quickly.

Oh, and make some space in your house or garage. You start this old bike thing and you are going to need it......