that's fair.
problem is what you 'found' is not the basic 1hbh. a low take back like this will never reach full potential.
1 drill I start people with, when they first learn to hit this shot, is just to push the ball with the thumb on bevel 6.
no unit turn. no turning side ways, no back swing, no leg drive. no nothing.
stand flat footed, square to the ball, just stick your hand out and push bevel 6.
you should be able to sustain a rally indefinitely with this, deep to the baseline.
THAT - is the 'basic 1hbh'.
if you understand what the hand does, then you can build this shot, from the hand, down to the ground.
and without showing a video, I can guarantee you that I can generate more depth and spin, with just the thumb, than your entire body - that is with the way you are hitting right now.