Start from a seated position
We are seated for large portions of our day. For office workers, possibly most of our day. (Get up and move around more! It’s good for you!) Drawing a handgun from a holster from a perfect standing position is different than drawing from a seated position. The more often you sit, the more often drawing a handgun from a holster should be practiced.
Try drawing and shooting from a seated position as well as drawing while standing up and moving.
There could be a situation where you need to draw and shoot from a seated position and there could be a situation where you can get up and move – so practice both!