Hi Naveen,
Glad that you wanted to start off into SAP carrier! Yes you can start off with SAP Production Planning and Control module for SAP ECC. Since you have domain knowledge and have experience working in the same, this could help you advance the career in SAP.
You can find more about it at https://training.sap.com/shop/certification/c_tscm42_66-sap-certified-application-associate---production---planning--manufacturing-with-sap-erp-60-ehp6-g/
Here are some Tutorials SAP PP Tutorials - Production Planning Functional Module
Hope it helps!
Shankar
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