Please don’t overburden yourself by wearing your new belt. The hard steel can’t fit the form of your shape like a leather belt. You need to be aware that you have steel covered your body so take your time you get used to it.
After you bend the waist band you can start slowley but only for a few hours. You can put it on and off and after a couple of weeks you can start wearing it for a longer period. There are no short-cuts. While pausing you can bend and adapt the waist and croatch band to avoid pressure marks. After a while you will enjoy the belt.