Learning on a Blade CP can be done, but your skills won't progress very quickly. My second heli was a CP Pro and I spent months just trying to learn how to keep it in the air through a full battery. I then moved up to a 450 sized heli and my skills progressed pretty quick. In a month I could do what I used to do with my Blade CX. A good cheap beginner heli would be a fixed pitch or a 450 sized. If you have money a .50/600 sized heli is even better. They are expensive to buy and fix and are intimidating, but they will hover hands off and fly very easy in most wind conditions. Another good idea is to visit/join a local flying club. I setup and test fly people's helis at my club to make it easier on them to learn.

Nick