You can expect to be proven wrong about 100,000 times in your first 200 hours of dual instruction. It'll only be about 50,000 times in your second 200 hours, and diminish with time. By the time you get 1,000 (god forbid) you'll wonder how you got your CFI when you did since you'll think you didn't know sh*t. And if it's Part 61...expect a lot of private pilot applicants, discovery flights, and ramen noodles. Congrats on the job and stick with it.