Find the home-row anchors
Place the left fingers on A, S, D and F, and the right fingers on J, K, L and semicolon. The raised marks on F and J help both index fingers return without looking.
Each finger owns a vertical zone. Reach from the home position, press lightly and return. Use either thumb for the space bar and the opposite little finger for Shift when typing a capital.
Build the keyboard in layers
First practise home-row combinations, then add the top row and bottom row separately. Short real words help convert isolated reaches into useful transitions.
Do not hide mistakes by rushing. Consistent finger choice matters because repetition is teaching your hands a pattern whether that pattern is helpful or not.
Move from lessons to natural text
Once key positions feel familiar, use sentences and paragraphs with ordinary capitalization and punctuation. Gradually reduce reliance on the visual keyboard and review weak keys after each test.