Marketing/MIS major @ GVSU and TERP10 certified. In terms of learning material regarding FI/CO, Professor Magal's text Business Process Integration with SAP ERP (https://www.amazon.com/Business-Process-Integration-SAP-ERP-ebook/dp/B00BL828LY/ref=la_B001JSHIYS_1_3?s=books&ie=UTF8&qid=1477241900&sr=1-3) is dense but effective. First two chapters introduce you to both FI/CO, and the remaining go into detail regarding process integration (procurement, production, fulfillment, etc.). Again it's a bit of an investment, but worth it if you'd want a detailed overview of practical SAP instances. There's other texts by the same author to if it proves too intensive!