So your 10 stone. I could climb hills if i was that weight. But alas i am not.
As already posted get fitter and change those rings and cassette until you are happy.
Also and at the risk of repetition this is a beginners forum and climbing hills is not easy - not everyone has legs like tree trunks and thank christ for that; last week I followed a cyclist going up a long long steep hill local to me in my car. I had a little over 15mph on the speedo.
Although he was seriously quick he was utterly emaciated imo with ridiculous out of proportion legs - whilst I was impressed with his speed I would not want his body shape.
This is the Beginners forum don't you know? How dare you question leg musclesBody shape is fairly unique to individuals, but anyway it wasn't his leg muscles that were allowing him to ride up the hill at 15mph - it was his CV and aerobic system...