I recommend starting with kale, since it seems to be a favorite among most veileds, then they can have small bits of fruits, general varieties of the darker lettuce types, raddichio, dandelion greens, and mustard greens are all good.
Adding on bits and pieces since I am tired and focusing poorly.
As far as basking, giving him food a couple hours before lights go out is fine in my opinion, just long enough for him to warm up before night and eat well.
Honestly aggression with chams is so much worse so often so yeah. And a lot of people don't realize how to make trust happen with them. Currently the way you are moving him is best since he will likely need more messing with than he will like in the beginning sadly.
Cricket Crack is a good gutload, I usually add something like Repashy's superload, and entire jar of that works for like 1 pound of cricket crack and you have your bases covered. And yes super worms gutload on that. Of course you still should do fruits and veggies for them.
30 minute showers only need to be once a day for him currently, later on you won't need to do them unless shedding issues happen or illness.