It's not that straightforward.
The Red Planet has a different orbital inclination that the Earth and a simple
propulsion of a microwave sail [The Late Robert Forward first proposed it] from our planet to Mars is not going to get you there; other vectors of force are required.
Tacking normally would be a solution, but we're talking about a flimsy, gossamer-thin sail and I can't see successful tacking taking place with that flimsy, thin hardware.
BTW.... I still hope the PS solar-sail works well next month.