It is really great not seeing "DnvrFox" as the author of almost all the stickies, and of having just a couple of stickies!
Thanks Catweazle and others.
Here is a good link for the VERY beginner:
Learning to Ride as an Adult
Here is an edit on "Bar Height"
You wrote:
"Bar height
It won’t be an issue with step-through (ladies) bikes of course, but if that bike frame has a top tube you need to have clearance when standing astride it. For comfort and safety you should be aiming at a minimum of two inches (50mm) of clearance between crotch and bar, when you’re standing astride and off the saddle. If you don’t have that then look for a bike with a smaller frame, because that’n is too big for you."
Actually, on a road bike, and for guys like me with short legs, if you get a clearance of 2 inches, you will be riding a frame way too small. Bar height is among the least important of the measurements on a road bike fit. I have nowhere near a 2 inch clearance. This will vary with a compact frame, as the top tube is slanted.