Usual problems with steep turns are: inadvertent climbing, nose slicing down through the horizon (scary) or using "up" rudder, instead of elevator, to keep the nose up (dangerous).
All craft are different and you have to develop feel i.e the balance between power, rudder, aileron and elevator to initiate and maintain a balanced turn.
Try this. Initially do instrument only turns. AH for angle of bank, VSI for level and turn and slip for balance. Once you've developed the sequence of power, aileron, rudder and elevator to initiate and maintain a balanced steep turn and more importantly you can feel this through your hands, body and feet then look outside for the visual clues that produce the same.
Always have at the back of your mind the stall speeds for the respective "g" loading and the 'g" loading required to maintain level flight for the respective bank angle.