Hi Parag,
Same thing was with me 1 year ago & I was totally lost in this SAP world. Selecting a proper domain of interest is really tricky here.
1. First I thing I would suggest is you need to have proper understanding of SAP as a product & then focus on the modules under this suite.
2. Second, you come from a technical background & if you have interest in coding then you can opt for ABAP, CRM modules.
3. If you're interested in ETL of data then you can opt for SAP Data Services.
4. SAP supports business warehousing & reporting, so here, ABAP skills will be helpful to you & you'll learn much more about BW/BI(business Warehousing/Business Intelligence) in SAP.
5. If you've good domain knowledge about Finance then you can opt for Finance domain as well.
SAP is full of varied domains,you just need to find your interest. Stick to one & in the flow you'll learn much more(I'm doing the same Image may be NSFW.
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Hope this helps & Welcome to SCN Image may be NSFW.
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Regards,
Santosh