No, no tutorials that I know of, I have used excel for years and I am pretty much all self-taught. Its really pretty simple, there's not much to it. In school, I've had spreadsheets that could make your eyes bleed. Just start it up and I think there is a Microsoft tutorial in the help section, it'll get you started.

Those equations are really only a function of one variable, the CG location, the other symbols represent empirical values that are characteristics of the airplane and don't readily change for a given airplane, such as the wing and horizontal tail lift coefficients and the volumetric coefficients.