pricing a "beta" version of my program

I have created a 3-month program that leverages the visual arts to help creative (or closet-artist) women over 40 stick to their fitness and weight loss goals. I plan to launch the program at the beginning of Q2 (umm, and I’m shaking in my boots).

Here’s my question: do I market it as a “beta” version of itself for half price, since I don’t know if it will actually work (i.e., the value might not be there)? Or do I decide it HAS to work, and launch it like I know what the hell I’m doing, and charge the full price?

Thank you!