brain in space...help?

ok, i was working on my resume when my laptop died without warning and unfortunately all of the editing i had done didnt get saved....So now i am having to start over from the really rough draft that did save.

I have always worked fast food and recently got a job in an actual restaurant. I quickly picked up how to waitress effieciently.

I had a perfect sentence basically stating what is written above, but sounded very professional. And i think the first word i had used started with an r (but almost everytime i say something like that its not the right letter)...

Can anyone please help me?
Even if it isnt what i had before if it still sounds professional ill take it!!