newcomer question

[vbzebra]

Forgive me for the following lack-of-intelligence question, but.....

I'm a basketball official looking to begin football officiating as well. Will be doing youth and probably sub-varsity this year. Classes haven't started yet (a couple weeks away still), but I was just wondering how the learning of positions goes. Basketball officiating positions are interchangeable throughout the course of a game. In the football classes, are we taught a certain position for the year (i.e., umpire, line judge, back judge, etc.)? Or do we learn ALL the positions?

Also, as a first year football official, are there "ranking/experience level" positions? for example, I KNOW newbies aren't the "referee"...are they put in position of backjudge or linejudge, etc? I'm sure all these questions will be answered in my class, I was just curious. thanks!