I have had the opportunity to be an FTO, and I tell all my new folks the same thing:
Pencils have erasers for a reason; we all make mistakes from time to time.
The first time, it's experience; the second time, it's a mistake.
No one expects you to be perfect right out of the gate, that's why people who have been doing this for a long time are referred to as "experienced". Parenthetically, see previous; the term "experienced" can work both ways.
Keep your mouth shut, and your ears open. Observe and learn.
Every person you work with will be an example to you. Some good, some bad.
If you can sleep soundly, knowing you provided patient care to the best of your ability, then you probably did.
Don't be so prideful and vain that you can't go to the books and look something up if you have a question. Contrary to (seemingly) popular belief, all the pages in your textbook do not go blank when you receive your ticket.
The more you learn, the less you think you know.
Now, go forth and do good things...
Haha. Funnily enough I was told by a few of my co-workers I should apply for an FTO position... And that's only after working at the company for 3 and a half months.... Too bad I didn't know about the positions, sucks working at night cuz we don't get the page announcements when the pager is turned off! Oh well. There's always next time, and I'll know more about the company and things by then.