I've got a CCO as my carry pistol and it's the perfect CCW pistol!
Thin, commander slide offers reliability. Officer's frame ideal for OWB or IWB.
As for a first pistol, if the OP is going to carry, its a great choice.
If he's going to the range only or for home defense, get a government model.
The forged alloy frame will handle anything the shooter throws at it.
Enjoy whatever you get!