Welcome!
A hornbow? That would be interesting. what kind? pics? Don't twist it... (I twisted my magyar hornbow :\)
Korean hornbows are crazy to maintain.. good luck, if it is one
60lbs sounds quite heavy for learning, I just bought a 20lbs segye bow for tuning my form. I plan to get a 60lbs or more (70lbs?) Korean bow when I feel that my form is actually good and I can hit the 145m target with some frequency with the 41-45lbs. Though my horn bow is already 60lbs..
if you're strong and already have good general form, 60lbs might be fine though
However, this light bow stuff is more common in modern western archery teaching (Gao Ying text said ~40lbs, no reason to go lower, but we go lower), but I did it because my accuracy really sucks and I'm sick of it, and I notice it is difficult to rotate my bow arm properly with a not-very-light bow, I hunch my bow shoulder, and my release is not as clean as I'd like. Even with these faults, I was told to just do pulling exercises with a 41lbs bow.. breathing in, then out after releasing (or un-opening the bow - never dry firing)
Though I guess one never stops learning? :\ I guess for "maintaining" good form, a heavy bow is good.
Korean bows are fast. a western recurve with wood arrows at 20lbs is good enough for 18 meters, so a 20lbs Korean bow with light carbon arrows is more than fast enough..