Just do a little workout to strengthen your hands, that will help a lot.
Practice is important too, but practice proper techniques. Try several recommended methods and see which one works best for you.
The CZ has a little stiffness and a stout recoil spring, but it is not the worst by far.
It really just comes down to getting confidence and familiarity with handling and manipulation.
Remember that the pistol has a special finish that does not need oil to prevent rust, so make sure to keep the outside clean, this can help with getting a grip on the slide.
Take the time to think through what you are doing, look at yourself and your build, and figure out what works for you.