Even after practicing on the flight sim... the Cap 21 is about the WORST choice for a first aircraft. I give it a 99.95% chance of destruction within 30 sec of the wheels leaving the ground.

Its untrimmed. (Strike 1)
There is a difference between flying with a sim and the actual model, no matter how good the sim is. (strike 2)
A Cap is not an inherantly stable aircraft, and is subject to severe tip-stall into a spin. (strike 3)

Beginners, even those who've flown full scale aircraft AND practiced with a sim, routinely tear up trainers when they try to fly without assistance.

The worst "student" I ever had was a Squadron Commander, US Navy TOP GUN trained fighter pilot... He got NOWHERE until he started listening to the "kid" (I was only 17, and I was teaching him to fly Control Line, which is EASY compared to R/C.) Then, when he did listen... everything started working. (But he had to break 3 planes first...)

This hobby can be EXTREMELY frustrating if you accept the bad advice of training with a sim, and then trying on your own... especially with an inappropriate model, such as the Cap 21.

See my post titled "BEGINNERS! GET HELP!"