TLTR; The one you like the most, and you feel best with. Right now, you can find a vast number of keyboard layouts. Besides the most widely spread “Qwerty”, you can try many more on TheTypingCat like

TLTR; The one you like the most, and you feel best with. Right now, you can find a vast number of keyboard layouts. Besides the most widely spread "Qwerty", you can try many more on TheTypingCat like Colemak, Dvorak, Workman, and many more*. It is worth trying them because they optimize the typing process. Some of them are reducing even by half the distance your fingers make writing text. So also, they can make your typing speed better. * - Please see the settings menu for the full list.