Golf is a game played with your hands. Until you recognize that the hands and the clubface are the same, you will struggle.
There are no positions in the golf swing because it is a fluid motion. If there were one position that mattered, it would be impact.
When your arms and body work with the club, you gain more control of your swing. Practice getting a feel for the forces of the swing.
Pressure can cause you to make mistakes in your game. Learn how to adjust and correct your errors.