Try feeling the technique. If you are overpowering your attacker perhaps you are using too much muscle-especially if your body size or strength is considerably greater. By blending with and feeling the energy of the attack you will get a better understanding of how to manage the energy and how to redirect it.
Beginners are challenging for even seasoned instructors since they are afraid of falling, don't understand how to respond with their bodies and are often stiff and resistive. Controlling and managing the energy of such a person will be a good learning experience for the varied attackers and attacks you will experience throughout your training.