Punnett Squares Question, am I doing this right? I need help, please.?

Yes you are doing this correct, the genotypes are perfect, it doesn't matter which way the parents go on a punnet square. You would need to do 2 punnet squares I think (sorry it was last year I did them =D) there's 100% chance of a black offspring and 25% chance of a waltzing offspring so I think its 25% chance of having black waltzing mouse offspring