no worries! as far as the lighting, it will be fine for you clones, but do you have some other lighting source for veg/flower?

a humidity dome is not needed, but it probably would help.

you don't need to add anything to the water.

if they are standing up and appear to be okay then i would leave them be. just make sure to check the water level and make sure that it is splashing on the bottoms of the cuttings.

good luck!

-shake