Build a better approach
Putt Line is a green, a ball, and a cup that does not sit still. Aim with the pointer so the guideline shows the start of the roll. Hold to charge, release to stroke. Power is the length of the hold, not a second stick. Keyboard players can use Space for the charge once the aim is set.
The cup drifts. Aiming at where it is now is how short putts slide by. Watch one cycle of its motion and send the ball to a meeting point. Slow rolls that die at the lip still count and often score more than a slammed hit that rattles out and leaves the green.
Turn information into decisions
The green has a boundary. A ball that crosses it costs a life. Maximum power is for long holes, not for pride. After a miss, change either aim or power, not both, or you will not know which correction helped.
Hold a tiny pre-shot routine: line, then meter, then release. If the cup is still sliding across your line, wait. Waiting is a stroke you do not have to take. Three lives are the session. A hole is over when the ball stops in the cup or leaves the grass.
Practice for consistent results
Read the result. Short means more power or a later meeting point. Long and offline means the line was greedy. Long and on-line means the charge overshot. Those three notes cover almost every miss.
Practice six putts where you freeze the aim before charging. If you feel yourself twisting mid-hold, abort and start the routine again. Makes will follow the routine, not the other way around.