For your very first heli, a 450 is definitely not the one to go for.
You want a small coaxial or fixed pitch heli like a Blade CX2, MSRX or similar.
There are many brands out there, Blade being one of the most recognised.
Then the best investment is a simulator like Phoenix, Real Flight or AccuRC.
This will teach you a tonne, and doesn't cost a thing, when you crash
