If you are unfamiliar with MIT systems (or might need a refresher) here is the list of online trainings I would recommend:
Fundamentals of Financial Management
Travel Policies and Procedures for the Approver
Travel Policies for the Traveler
Intro to the Space Management System
ProCard Cardholder Online Training
ProCard Verifier Training
Credit Card Verification Process
Intro to Sourcing/Contracts/Procurement
eRFP: Reimbursement
MIT Benefits Orientation
Take good notes on the online training so you can review them later on!