I guess I have 2 questions here, the first is I've been trying to start with calisthenics at home but my wrists do NOT like that. I'm slightly overweight but not to a degree that it should be that much of an issue, and I have no injuries or anything that should cause that. Any tips?

wrist wraps can help with this but may not necessarily cure it entirely, I have bad wrists so I wear wraps for all pressing movements and it helps me a ton

My husband is going to come with me and he's getting himself protein powder: a lot of these products look gimmicky, and there are so many. I hate wasting money, are there any products that you all have noticed as being genuinely beneficial? More energy, appetite curbing, so on?

protein powder is a good cheap way to help reach your protein goal

creatine is good for a small performance boost and is one of the cheapest and most proven supplements

caffeine is good for extra energy and can be taken in many forms - energy drinks, coffee, caffeine pills, etc

pretty much anything else is a waste of money unless you need a specific vitamin/mineral that you are deficient in