Congratulations to you both and welcome aboard. You're getting in at a good time. Between retirements, some of the junior captains and senior FO's going to Legacies, purple & brown, there should be some decent movement here the next few years.

The training center is modern, clean, well equipped and comfortable. The kitchen has free coffee 24/7, microwaves and refrigerator to keep stuff in short term. The systems is done by CBT that you'll get before heading to training. Really dig into that as thoroughly as you can since very little in class time will be spent on systems.
Definitely get into study groups and use the crew room at the training hotel to study & quiz each other. There are two 767 procedures trainers at the hotel to practice flows, profiles and oral button & switch Q&A.