Everybody knows you should hit the ball first, and the ground second. Well, if you didn’t know that, you do now.
That means the bottom of your golf swing arc must be in front of the ball, not underneath it, and definitely not behind it (that’s called hitting fat).
These pictures show what that means.
Here’s an easy drill to learn how to do that. You need to be on a mat, without a ball. Merely set up, swing the club, and brush the mat with the sole of the club ahead of where it was at address. Over and over. Figure out how to make your swing bottom out ahead of its address position.
You need to do this on a mat because otherwise you would tear up a good bit of ground. Also, the club hitting the mat gives you aural feedback as well as visual feedback.