I had a similar experience as Frank, although thankfully without the hed bust.
Had a 15-minute crash course the day before from the SE, and got thrown into the fire the next night. Working essentially a slot shift, although at that paper, whoever was "on desk" was ... well, you were the man. Nobody else to help design, except the news side if you fell really far behind and they could spare a deskie.
I think I missed deadline by 10-15 mins, but I got all the major stuff right and didn't screw anything up, so the bosses were happy because it was my wedding night. I was a full-time writer then, but I've since switched over to the desk for good (steadier hours played a huge part, and a bump in pay played no small part, either.)
As Frank alluded to, good part about this job is that it's just like baseball: If you go 0-for-4 with 3 Ks one night, you can come right back out with a four-hit performance the next night. Just gotta shrug off the bad nights and come out fresh the next night. Easier said than done, I know.
Oh, and try to hit a little closer to .900 in this league. .300 ain't gonna cut it, especially when it comes to making deadline. (And that's Lesson No. 1 for a young deskie: Make Deadline. Lesson No. 2: Do whatever you have to do to Make Deadline. If you can't do that consistently -- and that's what I mean by hitting .900 or better -- then you'll be out of a job soon. That's a fact.)
And if you need help or have questions, feel free to PM.