Detailed Answer
Sit upright with elbows at 90°. Wrists straight (not bent up/down). Place left pinky on A, ring on S, middle on D, index on F. Right index on J, middle on K, ring on L, pinky on ; (semicolon). Thumbs on spacebar. Your index fingers also control additional keys: left index covers F, R, V, T, G, B; right index covers J, U, M, Y, H, N. Never let your fingers 'float' away; always return to home row after each keypress. Practice finger placement drills (e.g., 'ASDF JKL;' repeatedly). Use a keyboard with visible home row bumps for tactile reference.