I do believed that all of our driveway has a slight slope. I only use reverse to get out of the garage itself. Reverse is so nerve racking for me somehow. Here is my technique on reverse
. Put it in reverse, ride clutch while reversing (very short brief second), stopped when I am out of the garage and have cleared my garage door, pop into neutral, close the garage door, and let gravity take over until I am on the street and then put in first gear and off I go.