Nothing / no-one will prepare you to CFI. You have to do it to learn how to do it. Congratulations on saving $$$ by going to a good FBO. I gave up on FBOs after my PPL. They are too depressing for my blood. I felt bad when my CFI told me the boss paid him only $8 an hour but was doing him a big favor by letting him work there and log precious C-172 PIC time...

-LAFF