I would echo the thought of using a quality razor, not a cheap throw-away razor. You might like to try shaving a small area that wouldn't be easily seen to see how you get on. Unless you are the rare exception some itching is likely, but it generally isn't beyond endurance. Repeated shaving on a regular basis will not only keep the hair in check, but will reduce the itching. The first time is the worst. That's why a small sample area will help prepare you for what is to come. All the best!