Dear Harshad,
Starting with your last question,
Looking at your profile, I feel PM (Plant Maintenance) module can prove to be a good choice than that of CRM.
Coming back to your first question,
It is very very difficult to get SAP ERP Implementation job on the basis of ERP user profile. These days even SAP certified consultants are struggling hard in order to get such JOBs.
No doubt SAP can give you a very good career and bright future but it is all-most Impossible to get a break for it.
Please go through the given below blog:
Re: SAP FICO Fresher JOB.....Myth or Reality?
Keeping the above points in view you may explore the available opportunities.
Regards
Chirag