beanhead

Agreed. I would ask for a 5/8" and maybe even go to a 3/4" radius of hollow on your next skate sharpening. It will be easier to "shave the ice" with the shallower hollow and make learning to stop easier. Since you are new to skating, I don't expect you to have to adjust to the shallow hollow like someone who has been skating on deep hollows their entire lives. I am a bit biased though. I much prefer shallow hollows and find no advantage whatsoever in deep hollows. I think it might help you learn to feel your edges better also. Take my opinion for what is it worth though. I also agree with the suggestion to use pads while skating. You are going to fall. No way to avoid it. You will be more comfortable trying new things knowing you have a bit of protection when you fall.

I had the same issue with my Step runners. Way too much steel in the heels. I had to get the heels shaved down to make comfortable heel turns.

I am 140lbs and use a 7/8" hollow. I feel I am one of the very few around here with a hollow that shallow as the guys who sharpen them always double check what I say. They always say "you mean 3/8"? I find deeper hollows fatiguing and my knees get sore.