Which is the best module for me ?

Hi Chandra , currently I am working in bpo domain , I would like to change my career to sap , I am seeing so many modules in sap , please suggest me which is the best module for me ? I came to know there are two parts in sap functionality and technical , I don't want to go technical side , please suggest me which is the best module for me ? My work experience is bpo side ( healthcare ) , I am in confusion which the best and long Term career module for me ?