You're also at least a little 'self-aware'... if you detect that you're intimidated, you at least know that there's potentially a dragon in front of you to joust with. Just stay the course, as it were, and you'll cover a lot of ground in due time.
One way to think of it is that if the school is 5 years... you'll spend 5 years adding to your knowledge and experience and hopefully gain something that will help support the next level of achievement. If you don't invest the next 5 (or x number of) years doing so, the time will pass all the same and you'll end up 5 years older without the knowledge and experience.