DO use a simulator
Do find someone who knows how to fly heli and can make sure setup is right.
DO use a radio that others around you use for heli's
Do expect to crash.
DO start with something like a Raptor- cheap and easy to get parts and everyone knows how to work on them.
DO use a simulator (it will save you thousands)

DO not try to land of loose carpet, cardboard, etc.
DO not spool up on a hard surface.
DO not let your engine run too lean.
Do not forget helicopters attract bystanders like flys and be aware you might need to avoid a fool.