How long does it take to get used to the rules of handball?

It took me a long time to get used to the rules and the game of American football, how long do you think it will take for me to get used to handball?|||Well, football is really complicated with tons of penalties including holding, false starts, face masks, delay of game, and many many others. Handball is pretty complex too, but it's not as complex. Furthermore, it is similar to other popular sports while football is nowhere related to other popular sports.|||if your smart..u get it fast