Switching instructors that early in your training can be rough. If you know you're going back to FL that soon I'd wait and start up when you get there. Go full throttle from there. Save some money and use it for training when you get there

As for how you know if he/she is qualified to teach... You could always ask to see their license... But most people that take the time to show you around the area are instructors that want you as a student.

Hope this helps.