Surely you will have a ground course or an induction phase where they will tell you how to get started.
The OMB is going to be your bible, but where I work for type related normal SOPs, flows and abnormals refers to the FCOM. You should have read the FCTM alongside the FCOM normal and abnormal procedure section during your type rating. The Part C will contain route information and airport briefings.
If it's your first line experience you may feel overwhelmed at first, but you aren't supposed to commit everything to memory. You need to know where to look for things.