Should You Shower Before A Wax Help Me To Prepare For My First Brazilian Wax!! And Legs/armpits/arms..?

Help me to prepare for my first Brazilian wax!! And legs/armpits/arms..? - should you shower before a wax

What should I bring?

How long does my hair?

How long before I shower? (I've heard in the shower just before a wax hurts more)

What exactly happens at a Brazilian wax?
Exactly what my field ********- them?
How much in general?


Nothing else to prepare / what to expect?