Need someone proficient with SAP ABAP Tcodes such as FFQEVENTS, SM37, BAPI to show me how to debug and extract fields to write functional speciification document

I’m a functional SAP Consultant and very proficient in SAP configuration but I am writing a functional specification, so I need to understand how the code is working in the tcodes (TCODES -SE37, SE38, BAPI, FQEVENTS) and how I can understand it to write my functional specification. I already have the BAPI name that we need to use a. How do I use SE37 and BAPI to Debug a Function Module or a BAPI? b. How I can see all the input parameters needed c. How I can manually input the input parameters d. How I can see the fields that are optional/mandatory etc etc 2. How do I use Tcode FQEVENTS & FQEVENT I will need to be able to share my screen with this person, so he/she can show me what to do.