Yes, you are gonna get dizzy the first few times. Do a little preparation. Figure out how long your engine will run on a full tank of fuel. Now, let your first flight be 30 seconds long. Keep after it until you can fly for 30 seconds without losing control of the airplane or falling down. Now go to 35 seconds, etc. I'd bet that by 4 or 5 flights you'll not be worried much about dizziness. If you have access to someone who knows how to fly, have them test fly your airplane. If they can be out in the circle and hold your hand for the first couple of laps, then gradually let you take control, you'll crash less. Also they could take the airplane back when you get dizzy.

If you are flying alone in the circle, what you want to do is hold your arm and wrist stiff and look right down your arm at the airplane. Point your arm where you want the airplane to go. Later you can start using wrist movements, after you understand what's going on. Flying CL is like swimming or riding a bicycle. You never forget how, and once you can, you don't understand why you had to learn in the first place.

Jim