Wow, that's a tough one. It depends on a lot of things. I bought a CP used on the internet. I'm 54. I just had no luck with it at all, so I bought a new CX. The guy who bought my CP said it flew just fine for him. I'm glad he's happy with it.
It really depends on a lot of things. Some guys are flying a CP in a week and doing well. Others, just don't get it. Some are natural athletes and others can't even shoot pool. Just no consistency in their eye hand coordination.
If you have always had very good eye-hand coordination and you have a large slick floor to practice RAADS and you have spare money to buy replacement parts for the CP and if you really want to fly outdoors in a breeze, then get the CP (or the CP Pro) as bzinfinity says. He has been a reliable source of information on this forum. I trust his opinion.

In my case, the CP was taking too long to learn. I have too many interests and I had to admit to myself that I was not going to put into the CP what it deserved to be flown well. So I got the CX. I don't have a large slick floor, if it's breezy out, I'll fly my airplane, I got aggravated when I had to spend $10 each time a CP rotor blade hit something.

Anyhow, I spent time getting the CX trimmed perfectly. And I took pride in the results. I learned to fly the CX pretty well and I took pride in that. With my varied interests, I find that I don't even need multiple batteries because I only fly for a few minutes at a time. That's my life. I did come up with a way to increase the performance of the heli so it will compete with a light breeze outside. The cost is under $5 and it's an easy mod. Performance is elevated and it's more challenging now. So I'm happy.

It's all in knowing where you are and what you can do. And be honest. And there are CX's and CP's used on-line so you can try a CP and not have to take a total loss if it doesn't work. But don't underestimate the CX. There are a few of us flying the heck out of them and having a good life. (If your local hobby shop (LHS) doesn't have anything for you, look at the sponsors of this forum for the heli so you have support from a shop, or look on ebay and come back to this forum for answers.)