Many amateur golfers set up to the ball with their body wide open, their booty back and their weight settled in their back heel. This can lead to a cascade of issues in your swing.
A great checkup for your alignment at address and the connectedness of your arms and body throughout the swing is this drill using a your PlaneMate band.
Use the small green PlaneMate band and an aimstick to keep the alignment of your forearms organized. Wrap the band around your forearms and connect to the aimstick on top of your forearms. Now, when you set up over a golf ball, you have the visual of your forearms on the same alignment as your target line.
This is a great checkup for your swing.