Bear Paw,
As two wings said you will be fine. I seem to remember having similar thoughts when I first jumped into an aeroplane. The first thought that flashed through my mind when the wheels left the ground on my first flight was 'how the bloody hell am I going to fly this thing on my own?'. Its like anything, it all comes with practice. Also remember, by the time you are ready to start your CPL you will have passed all the exams, have around 150 hours total time and will be feeling alot more comfortable.
Enjoy it.