Touch typing means typing without looking at your hands. It is not about moving fast — speed is what happens once your fingers stop needing your eyes. Every finger owns a fixed set of keys, and the whole skill is teaching your hands that map.
Reading this on a phone is fine. Practising needs a real keyboard — a screen cannot teach your fingers where keys are.
Rest eight fingers on these keys. This is the position your hands return to after every single key you press.
F and J have a small ridge you can feel. That is how you find the home row without looking — the whole point.
Each finger covers a narrow column of the keyboard. Reaching with the wrong finger is the habit that caps your speed later, so it is worth being strict early.