I play with GI-SD. Several important factors for using this ball:
- Improved trajectory
- Longer carry
- Changes the dynamics of your shorter irons and wedges significantly
CTTH challenges in my opinion a must when you change your clubs, and or ball to get a handle on how the ball and club interact with each other. Each challenge has unique holes, find them and develop shots on getting close. It will prove to be an invaluable aid on the course..
One of the most important aspects in this game is how much spin to apply to your shot. Don't forget, it is the club that generates the spin and the ball dynamics interacting with the club is the result. I notice the type of clubs you have, you may want to consider the GI2-D ball. Try it for a while, get a feel for what this ball does. It is, in my opinion, a good starting point.
Don't rush, and develop a game plan that will improve your game ultimately. Don't change everything a once. For me I change my clubs and kept the ball type constant till such time I was ready to experiment with new balls. Changing everything at once may create unneeded frustration.