be sure you have a good 88-90 hot basking spot with 12 hrs of UV going. Other wise he wont be able to digest properly.
The dragon needs UVB to produce vitamin D3 in order to absorb the calcium in the diet, without this lighting the dragon will get very little calcium from the food and supplements that you are giving it and will very likely develop Calcium Deficiency in herbivore and omnivorous reptiles or MBD (metabolic bone disease)
Pinkies can be fed either or as they wont harm him at all. start off with 1-2 per week as see how his weight goes. Dont push it on the pinkies as he is still young. but a few will help
"Crickets, mealworms (normal size, jumbo and super), waxworms, and earthworms, grasshoppers, butterworms, locusts, some people try small feeder fish like goldfish, and you may also want to offer a little bit of finely shredded veggies and fruit ( if your dragon will eat veggies this should make up about 10% to 15% of their diet) ( if you're going to try feeding them veggies and fruit, look for Melissa Kaplan's "ig salad diet" in her Iguana Care FAQ you can find the FAQ at: http://www.anapsid.org" Cutesy of http://www.triciaswaterdragon.com/diet.htm