You hear a lot of Don't do this" or "don't do that" in learning the golf swing. Let us concentrate on what you should "do".
A sound golf swing is a product of several correct and positive moves.
The "dont's" have no place in the creation of a proper swing.
Our goal is to build a strong repeating swing. To do this, we swing the club with the larger muscles of the body. (You can generate power using the large muscles of the upper torso and the strong muscles of the arms and legs.) A strong repeating swing can not be created if you use the smaller muscles of the hands and wrists.
To start the back swing, simply swing the club away with the triangle created by your arms and a line across your shoulders. This one-piece takeaway will move your "center" with the club. (The center is the middle of your chest.) The knee is starting to break toward the right knee while the weight of your body moves to the back foot.
At the top of the back swing you have created power by "winding up" the big muscles in your upper body. Notice that the "center is facing directly away from your target, and weight has shifted to the back foot.
The change from back swing to downswing is a natural release of the power or wind up you have created. The downswing is initiated by the weight transfer from the back foot to the front foot.
There are no tricks to solid contact. Good fundamentals will put you in a position to just "swing the club through the ball and toward the target".
Accelerating toward the ball
Same swing, side view
Same swing, rear view