But water snakes are relatively low on my list of priorities. So many species, so little time. A serch engine could probably turn some up. That site had a good write-up. I agreed with all of it except the temperature, which was too low.
Any snake is capable of biting.
Raise a baby and handle it, and it is likely to be much friendlier than a wild caught adult. I haven't worked with water snakes for years. I caught banded water snakes fairly often when I was in Louisiana nearly 30 years ago. They were spooky and defensive, but they weren't as defensive as bullsnakes, which is what I trained on. Besides, I thought the water snakes were pretty, with a subtle mixture of shades of brown.