Also the hardness of handstand is strictly dependent on your weight. A normal person at 50kg should have no problem learning handstand in 30 days, 90kg with no prior fitness training to handstand in 60 days is next to impossible.
I'm also uncertain how 50kg is the weight of a normal person. If I get below 75kg I'm around 5% body fat, and I'm barely above the US male average height. Getting to 50kg would mean losing a substantial amount of muscle mass, I literally have never had enough fat and so little muscle (even when I was obese) to be able to healthily cut down to that weight. And, again, I'm only about 1cm over the US average.
In this paragraph you seem to be interpreting "A normal person at 50kg" from the parent comment to mean "the average person, who weighs 50kg", when what they are saying is "a 50kg person who is neither too fit not too out of shape". A slim (but not extremely thin) 5'4" (1.62m) woman weighs around that much.