SAP BPC is fantastic module as a career option…. hope you know by now that it is a product which help companies build their budget, do forecasting, planning and financial consolidation. It has gained enough trust among its customers specially after the integration with SAP HANA.
From learning perspective it is advisable to get some insights on SAP BW which anyways acts as a base for BPC(https://goo.gl/Yg15mr) (whether standard model or embedded model). Slowly over the time you also need to learn functional things as technical alone cannot take you that far. In true sense SAP BPC is a techno-functional module.