Sugaring is better than waxing and better than shaving. There is also a new British line of polymeric wax products called SKIN'S which is supposed to be even better, but since you are in a rush, go on Yelp, look up sugar spas in your area, read the recommendations, and go for what has most upvotes. Note which practitioner in a spa gets especially good recommendations and ask for her. Half an hour before the procedure, have a meal, taking an Advil pill (do not take it on an empty stomach). Ask the practitioner to guide your breathing. To do the backside you would need to hold your knees - just do the best you can, this is not a yoga practice. You will be fine. Do not try to do anything by yourself at home - you won't succeed and just get disappointed. All the best.