My husband and I (67 and 64) and two ladies in their late 50's / early 60/s were there in October. It wasn't a problem at all. However we were on our own - not in a tour - so we could set our own pace.
There are steps and you can stop and rest and look about. I had heard the horror stories too, but there was no problem.
We don't smoke, but if you do, watch the cigarette police! One of our friends who went at a later time, lit a cigarette and got in trouble. Of course we thought that was funny. He had to use his hand for an ash tray and carry the butt around in his pocket.
I hope you have a glorious day and can see for miles when you go.