I wouldn’t worry too much – surely the 5 weeks training will give you the basic knowledge they want you to have. If it doesn’t, then it isn’t a good course.
My advice would be to absorb as much info as you can, ask plenty of questions and then go out into the field with a bit of humility. No-one knows everything, (there are some people out there that think that they do…), so you will be learning on every trip.
Make a concerted effort to get on with your fellow team members and then enjoy the ride…….
Good luck.