Learning to ride a bike is not hard at all unless you have something working against you. Now if you are over 50 age and reaction time may start to catch up with you.

My one hint is it is easy to ride a bike. It is hard to balance on a bike that is standing still. If you are afraid then the natural tendency is to slow down. This is BAD you are making it hard on yourself. I'm not saying you have to hit 20 mph, 10 is plenty, but somewhere near the pace of a brisk walk it starts getting hard to balance. Go slower than that and you will have trouble.

If you can get a mountian bike or other bug tire bike that may make things easier. A off road bike on grass trimmed short is ideal as then a fall is something to laugh about. But to start pick a place with nothing for you to hit and nothing to hit you.

Odds are you will either have no problems or they will seem foolish and avoidable looking back. (Hopefully with a few more tips it will be the former).