Wax sensitive skin

I need some help. I’m going to try waxing for the first time this weekend. Front and back ...down below ...if you know what I mean. Yes I have help just in case 😂 (my SO- should be fun). I need you beautiful ladies to tell me the exact name of what YOU think I should buy? There’s so many options and I don’t know where to even start. I have sensitive skin also. And preferably something I don’t have to order offline .. like something I can get at Walmart or Sally’s beauty or places like that. I just don’t even know where to start! Any help is appreciated. Also any advice on if I should do anything before and or after the waxing also. I’m nervous!