Big question. How serious are you about flying a heli and how much do you want to spend?
If you want something simple and cheap to give you a fix, consider the Air Hog/Picco Z which is almost unbreakable. It's small and you can zip around indoors.
If you want something more real-like with a great chance of success for a beginner, consider a micro coaxial like the E-Sky Lama, the E-Flite Blade CX2 or the Heli-Max Axe EZ.
If you really want to dive in, you will probably want a collective bird. And there are many. Mini. Micro. 30-size. Electric. Nitro. All sorts. And they can range anywhere from a couple hundred dollars to a couple thousand. All depends on how serious you are.