The Clevelands are a high trajectory club. Makes for softer landing and better stick. I would advise renting the CG16 64* wedge for 1 day. Cost about 75 credits.
Buy a sleeve of WGT B-ES balls for 10 credits/sleeve. They have 1 dot of spin. Set up a practice round on a course with LOW WIND to map the club. I use Kiawah #1 or #2. Play and try to get the ball to about 50 yds from the hole, and on the fairway. Then make repeated shots using the MULLIGAN BUTTON, at full b/s, 3/4 b/s, center spin, 3/4 top spin and full top spin.
Record if ding/no ding and miss L/R. Record ball flight distance, and total distance of each shot. Do this for 50 - 100% power levels at all spin settings. This will tell you what the club will do with that cheap ball. Performance will be better with a good ball, with more dots of spin.
You should map every type of shot eventually. But you'll be most interested in full shots at first. For other shots you have to change your distance to the pin, so the ball always lands on the green. Recor wind MPH and direction also. Hang on to that chart for shot planning if you buy the club.
You might find that at your current level, the CG16 works fine and you don't need to spend the extra money for the 588's. As you said, you can get 2 CG's for the cost of 1 588.
Good Luck
Phred952