Doing a good race launch is hard, especially as a beginner.
Really learn your clutch like others have said, and on level ground and down slopes don't use gas to make sure you get the full feel of it grabbing.
When you can use the clutch to get it going, and completely take it off while maintaining a smooth engine motion, THEN apply gas, you'll be getting it figured out.
But, it is additional wear and tear on your clutch, learning properly. Or you could alternatively beat the shit out of it until you get it, which could arguably do more damage.