HI
I do not think an education background will make you a better or worse flight instructor.
As far as getting a job, I've never seen a requirement for an education background in the search for a FLIGHT INSTRUCTOR>
I have seen it important for someone teaching systems or other forms of ground instruction.
I would take your internship in your major. IF you want to be a professional flight instructor, it is more important in my opinion and your likely employers opinion to be a good pilot.
I notice your location but am only speaking in terms of the USA.
In other words it is important you are a good pilot to be a good instructor. Being a good instructor with a degree in education might be helpful ANYWHERE EXCEPT THE COCKPIT.
One thing never really spoken about in flight instruction is that you must be able to fly the plane out of danger, and all the time spent learning to be an educator will not save you and your student when the dangers of the air present themselves.