The upcoming Practice Exercise for procurement was quite difficult for me. Besides not knowing how to use SAP at all, the instructions listed in the assignment were not that clear and took a bit of time to figure out what it was asking me to do exactly and how to do it. One of the websites that helped me get through one of the parts in the assignment was tutorialspoint. Below is a link to their Purchase and Requisition section.
https://www.tutorialspoint.com/sap_mm/sap_mm_purchase_requisition.htm
It has a great section on how to create purchase requisitions and purchase orders from purchase requisitions. One of the best parts is that the instructions include clear screenshots of the of each step. One of the issues that I had was that I could not figure out what my purchase order and document number were. From these screenshots I was able to get an idea of where this information was located. The only thing that I wish tutorialspoint did better was to have more comprehensive tutorials. It was quite difficult to figure out the next few parts in the assignment and I could not find the tutorials for them on tutorialspoint.
Source: https://www.tutorialspoint.com/sap_mm/sap_mm_purchase_requisition.htm