I had mine done 13 years ago. It was a simple out patient procedure done in about 39 minutes. They will need access to the area, so you would need something to collect (condom cath) or stop (clamp) the output of urine.
As far as what to wear after, you may have a couple small bandages and some soreness down there for a few days. It’s not that bad.
For hygiene purposes, they may ask you to do something different for a few days. Maybe not, either way just ask them for a recommendation.