Can a lawyer help me with my case that's out of state

Yes. Because your son’s accident occurred here in Orlando, then Florida courts have jurisdiction and you would need to retain Florida counsel. How did your son cut his foot? What did the motel do to cause this accident? If you can show that the motel knew or should have known that a dangerous condition existed on their property that would forseeably cause this cut then your son has a case. Discuss in private with counsel here in Orlando.