Touch type map and home-row position
On US QWERTY, the left hand begins on A S D F and the right on J K L semicolon. Raised marks on F and J help the index fingers return without sight. Use this touch type map as a starting reference, not a promise that every keyboard or body uses the same reach.
10-finger typing map and key zones
Each finger generally owns a vertical or diagonal zone. Index fingers cover extra central columns, while pinkies handle more modifiers and punctuation. A 10-finger typing map is useful when it reduces searching, but relaxed, accurate movement matters more than forcing a rigid assignment.
Finger placement, Shift, and Space
Use the opposite hand's Shift key when practical so the letter hand can move freely. Either thumb may press Space; consistency matters more than a universal rule. Return the finger to its home area after a reach when that improves orientation.
Alternative layouts
Dvorak, Colemak, AZERTY, and QWERTZ change character locations, but the physical key zones remain tied to position. Select the matching map during practice and do not judge an unfamiliar layout by a short first attempt.