Remember, the fear of the unknown is by far the worst part of all this. The human body is amazing and will take care of itself. My Doc assured me that there is very little that you can do that would be terrible except for really yanking out the catheter!
the cath is the scariest thing to face, but he will become a pro in no time at all. PS - my wife emptied my bag only ONCE and that was immediately after coming home from the hospital. After that, I took care of it myself. Most guys use the large bag almost all the time. just let it lie on the floor. a Recliner is a MUST. I slept in the recliner since I found it easier than lying prone and avoiding the tangled tubes. My wife was also able to get a better night's sleep since she was not worried about me with her rolling over. You need your sleep too. The catheter bag does not need to be emptied during the night, usually. I was always able to go all night without emptying it.
your husband will want a shower a day or two after surgery. It will feel good. Take the catheter bag off in the shower and he can just pour it down the drain. let the foley tube just hang during the shower. nothing will hurt it. Just let the shower water run over it and avoid having him lathering it up in case soap gets in his penis. After the shower, he tapes the foley tube to his leg (allowing some slack for movement) and then attaches the catheter bag and tapes that to his leg as well. He then can carry around the bag as long as it remains below his waist. No big deal. He can do all this himself. The first few days i found an old fashioned style flannel night-shirt was great. it was like a hospital robe, but better. And i did not have to fuss with pants and snaps and a waist-band the first few days. Eventually, the waistband did not bother my, but the first few days were uncertain. Also, these first days were more comfortable for me to go commando (no underwear). Boxers were my preference a couple days into it.
Do not worry about leaking urine/blood around the catheter where it exits the penis. there will also be blood tinged urine.
The first bowel movement is awful. Stuff will come out of his penis around the tube. frankly, it is a mess. it gets better.
Each day will QUICKLY get better.
Need any more painful details?? hahaha He will be fine. You take care of yourself too. Don't wait on him. He's a big boy. He needs to get up and walk.