Much, much easier than going from an Auto to a stick shift.

The one thing you have to remember is not to use your left foot ! It has been "trained" to deal with the resistance of the clutch, and touching the brake pedal with it normally resembles something like an emergency stop ! Other than that it is right foot on brake, select drive [or reverse] and remove foot from brake and you will creep forward, touch the gas pedal a little lighter than you would in a manual and your off. Time to stop or slow, resist the temptation to use that left foot as the brain starts to tell you that you should be declutching by now ! Lol.

Honestly, you have nothing to worry about and within a few miles you will settle into it.