[OverAndBack]

You'll feel like that for most of your first year.

If you do enough games your first year, near the end you'll feel it less. It just comes from the fact that it takes a lot of time and a lot of reps, first to get your mechanics down, and then to get the rules down.

I had an experienced official who I greatly respect tell me that it took him the better part of four years before he felt he had a decent grasp of the rule book.

I'm getting to the end of my second year and I am just now starting to feel like I'm comfortable mechanically. Rules-wise it's a whole different story still. But it'll come.

I haven't put it online yet, but I kept a diary of my first season and referred back to it before my second. The stuff I learned might be useful to rookies in the future.

In short - keep doing it. And keep messing up - it's the only way you learn.