Hey Sweetiele,
Firstly something that can really help before talking about the technical elements is finding the rubber that you feel most comfortable with and sticking to it, if you’re changing your equipment a lot it can be hard to adapt and be consistent. So I would say stick with the tenergy now and the same blade and give yourself time to really be confident with the rubber and get used to adapting to the best bat angle and way to contact the ball.
Hitting the top edge can often be due to the wrong timing, so make sure you are taking the ball at the top of the bounce and not rushing your shots. Also as you said getting the correct bat angle, and making sure you are brushing up on the ball against backspin to give you spin and safety.
Hope that helps!
