My 2 cents.

Unlike what you might be used to in the regionals; at JB systems is an absolute breeze. As is Indoc/FOM stuff. Don't worry about them.

The only bit that I found a little bit of a challenge as a newhire were the Procedures. Before you hit the the 2nd week of FTDs (the P's) you need to learn the flows - they expect you to know the precise order of button pushing and what you are looking for. Prevously, my experience was that as long as it gets done, who cares how you got there. Not at JB, they're pretty anal about it.

All you need to do is spend a few solid hours with your sim partner at the paper tiger making sure you know them and checking one another.