The most appropriate practice session.

Once you have developed a dependable forehand and backhand, all you need to do is stand on your backhand side just as you would after a serve. Then practice random feeds on either sides.
Over a period of time you will have developed ideal footwork if you want your shots to be precise and consistent.
Presently positioning, readiness and posture are not correct. You can correctly assume the trainee is only half interested in the drill.
Also, please learn to roll the ball from backhand as opposed to pushing it. Get your CG lower and roll hard... just like Fan Z does.