yes above note is the bible for the upload, it has an attachment on how to go about it
As i said earlier, you need to first define what you are planning to use HR renewal with SAPUI5 or only WD ABAP? its not straight to answer as your project team needs to determine where you headed first and what functionality you need
With HR renewal SAPUI5 you need gateway etc.
So since its a new implementation, please check what you require, your levels are good enough to get latest functionality, All info is there in my blog though