How to Transition into a Travel Staffing Agency

I currently operate a staffing agency that serves school districts and higher education institutions in California, focusing on therapists. I’m interested in expanding my agency to include travel staffing, allowing me to recruit candidates from outside of my state. I’ve searched online for guidance, but I may not be using the right terms, as I haven’t found the information I need. Any advice or direction on how to make this transition would be greatly appreciated!