Hi Sachin,
you must get your S-user first, before start to those things. Setting up a environment without having access to the service market would be painful for you. Did your client bought the licence yet, if not, then you are not authorized to have access yet and must ask your manager, that he is getting in contact with SAP to sort this first before doing anything else. Getting around that part is not something we can help you with, we can only highlight what pre-requisits you need be able to start with WCEM.
Best Regards,
Andreas