Kudos - you asked for
advice, instead of what most people ask for -
advise. This gets you a step ahead already.
As to bikes, my thought would be to start with a bike that you know fits you from the start, instead of messing around with a stem, etc., on a bike that may never be properly adjusted to your body.
Anyway, which ever way you go, enjoy. And, the fact that you are 62 should influence your decision in no way at all - heck, some of us have 10 to 15 years on you!!
