Not what you want to hear, but there is a glut of unemployed trained Primary teachers, with whom you would be competing. How could you demonstrate your ability to teach all subjects across the full curriculum range? You would need to show some evidence of working with children in the Primary age range, so you might care to look at doing some volunteer work. What aspecst of Primary teaching most attract you? You need to have a good answer to this should you be invited to interview. No, no courses necessary at present as there are already too many trained people.