More than just a tip, this video from Oracle ACE Robert van Molken and ACE Associate Phil Wilkins, actually demonstrates that you can set up an integration in Oracle Integration Cloud Service in under two minutes. The video walks you step-by-step through a simple integration that uses REST and SOAP connections integrated using basic map data.
And these guys should know. Robert and Phil are the co-authors of Implementing Oracle Integration Cloud Service (2017, Packt Publishing). Robert also has a new book coming out next year, Blockchain Across Oracle, also from Packt.