Flying and communicating (talking he talk using aviation language) can be challenging, but don't look at it as a mystery.
Find your won way of practicing radio communications, that's all it takes to effectively engage in talking the talk using aviation language in the cockpit.
As aforementioned above in the other posts, getting a VHF device and listening to aviation communication will help; as well as engaging in flying in a virtual environment such as the VATSIM will definitely provide you insights into becoming confident in talking the talk when at the controls in the cockpit.
If you can afford it, set up a flight simulation environment at home and engage yourself flying in the VATSIM environment. You would be surprise how realistic and sophisticated the VATSIM environmnet is and how this could elevate your flying experience. Just by flying in the VATSIM environment, I'm capable of flying advanced aircrafts and flying in any airspace (controlled or non-controlled airspace).