Learning is the key to success and the right guide always provides the best source for it, lets check the Oracle latest docs for each component of Oracle Cloud ERP (Fusion Apps- SaaS).
The Ultimate Source of Oracle Documentation URL For All the Products of oracle:
For All Oracle Cloud ERP (Fusion Apps/SaaAS) Documentation Modules
Docs are designed such a way that, once you navigate to module specific URL, all the docs specific to reports, integration, fbdi, tables etc will be available in this and you can see the below screenshot, where in the left side you have the links for Reports, Integration, Security etc
SOAP & REST WebServices
Configure and Extend