You are pretty much guaranteed to bounce if the nose gear touches before the main gear. Most trainer gear tends to get bent some and this changes the attitude the plane sits at with all three wheels on the ground. Try bending the main gear at least back to normal or enough that the plane sits level on the ground. Then when you flare at the right speed the mains will touch first and no more bounce. Keep pulling back and holding that nose gear off. If the plane wants to climb you are going too fast.