I move my hands as if my upper hand is making the coin fly up. I am almost at 1 and a half feet

. Have not so sweaty, but not so dry hands, and keep practicing whenever you have a coin.
One of the things that is very helpful for SMALL Hands is the muscle pass for a quarter. I can just borrow a quarter and muscle pass it! I can even do a penny.
Also, there are other uses for muscle passes; coin through glass wall visually (lateral), coin teleportation, vanishes, 2 coins across, etc.