IMHO buy a nicer bike, SV650 or 500 kawi, heck maybe even a 250 ninja, something pretty new and basic. learn to ride properly, and pick the maintence up as you go, you;ll get a way, way better modern bike, in which parts are readily available, and easy to get. If you find yourself some older bike, you never know, parts can be much harder to get, tires are harder to find with way less choices.
Really ask yourself, what is my riding going to be about? Do you want to ride? or do you want to be a mechanic and ride when your done with that. Nothing beats a newer good reliable bike for a first bike. Not to mention “starter” bikes usually hold decent resale value, so if or when you are ready to get something bigger and such, you’ll have something to trade in.
Not to say you may be able to find a good deal on a older bike, but all said and done, doubtful the bike will be a great deal by the time your ready to ride.
Sportbike style or harley style?
Heck there’s a pretty darn nice bike (honda XR) in the classifieds I learned to ride on pretty much that same bike. Is it a great fun bike? Does it wheelie?
Take a rider course availble just about everywhere.