Don't let your hand get to far from your body when you spin. Left handed spins follow the same rules except the go clockwise. With practice you can keep the axis of the spin vertical. This is important for a good catch. You need a faster spin for tricks and the catch is easier, but you will also tend to throw crooked if you try to put too much into the spin.
Practice helps here.
Drop your hand lightly as you catch to prevent any bounce. The ball should recenter itself with your finger as the new axis if you were not too far off. I catch the ball on my index finger with my finger tipped slightly so it lands on my nail rather than the skin. Lots of spinning on your finger tips can really make them sore. If you then try to move the ball around you will need to compensate slightly by moving your finger under the ball.