Thanks for joining up on Rc-Help.com. Just FYI, I'm the one in the videos. Well, my voice anyway.
Don't be embarrassed about the helicopter you just purchased. I have one of the cheap crap grade heli's hanging on my wall that got me hooked into this hobby. In fact, I have 3 of them. Just can't throw them away lol.
Get the DX6i, it will be one of the single best purchases you will make getting into the hobby. Second purchase, Get PHoenix Flight Sim. I say this because you are just starting, the cheaper sim is better, and you can use the spektrum or JR transmitters on teh sim. It's much harder to use them on realflight and I have found it doesn't work that well. Phoenix is the way to go IMO if you wnat to use the spektrum Tx, and it will be my next sim.
The first helicopter you should purchase for the DX6i is the BNF (Bind-N-Fly) Blade mSR-X. This single handily taught me how to fly a helicopter along with teh sim. It's the third best purchase behind the sim and DX6i.
If you are only flying indoors, a 450 is a bad idea. They are a little too big to fly inside. The mCP-X is the perfect inside CCPM helicopter as is the 130x. But, these are advanced 3D helicopters and are quite hard to fly.
My thoughts, get the DX6i with teh Phoenix sim if you can. This will teach you not only how to fly a helicopter over time, but it will also let you get used to the Tx as well.
If you have any questions at all, just post up in the forum. We are always here to help. Thanks again for joining Rc-Help.com!