So can anyone in the Fifty Plus forum provide me with advice how they improved their hill climbing?
Every year, (in the Spring) you might notice how hard it is just to climb "any hill" if you can not ride much in the Winter. Face it, if you ride up a hill onetime, it feels hard. The next time you climb the hill, it seldom get harder, and often it seems easier. Repeatedly climb hills and guess what happens -- they don't get "harder" -- they get "easier"........
You get better at riding hills by being "used to" riding hills. There are no shortcuts. Why do you think all the Pro riders go to the mountains to train?