this is my third reply to you in just the last few minets so bear with me.
I cant recommend enough that you see a professional for your first waxing, it will help you get the technique down but if you are insistent i can offer you some advice
wax- buy it at a drugstore not a supermarket. Walgreens or Riteaid will have a better selection of products intended for home use. For your larger areas you will want a standard strip wax, nair makes an ok one but I’m sure others are good. For your crotch and anus you want a hard wax, if you can find it the blue azulene one is alright. these waxes are applied at a lower temp and left to stiffen up before they are removed without a strip. Practice on a less sensitive area before moving onto your genitals.
Prep-DO NOT GET DRUNK! waxing hurts but the pain is temporary and the fear is mcuh worse then than the actual, it hurts worse when you do it yourself but the faster you are able to remove each strip the less it hurts. Take some aspirin an half hour before you start and drink lots of water. Your leg hair is too long to wax and you will need to trim it down before you start (you can use a beard trimmer or scissors). Clean the area carefully and oil or powder well.
action- work in small sections, hold the skin taught apply a thin coant of wax in the direction of the hair growth, lay down your strip rubbing onto the hair in the same direction. Hold the skin tight. Remove the strip in the opposit direction. Pull fast (its like removing a bandaid the faster you go the less the pain) keeping the strip close to and parrallel to the skin. quickly apply pressure
after- clean and aply the post treatment cream or oil they include in the pack
this should help. I do still recommend a professional but good luck.