ERP

Being a commerce graduate, do some research on SAP functional modules too like SAP FI, SD, etc.
Yes, if you looking for an interesting cum challenging job role, it's obviously SAP because of its potential to meet the business requirements.
It seems that you have already started a research about SAP Technical Modules, like ABAP, HANA, etc. SAP ABAP is purely a programming/coding and since you got a relevant IT experience you can very well proceed. It's the right time to go. SAP HANA is a hot module currently, so people crazily go with it, but it's always suggested to go for SAP HANA with sufficient knowledge of SAP ABAP. If you are a complete fresher and belong to SAP technical field then proceed with SAP ABAP and establish your skills with HANA and upcoming new technologies.
SAP Fresher's/Entry Level Jobs:
Fresh Graduates/Recent graduates who are very ambitious to get into a career into SAP Platform as a Fresher's, here is an opportunity on "SAP Internship Program"
Fee Structure: INR -90K
SAP Corporate Training: 1 Month, Chennai/Hyderabad
Placement: 3-4 Lacks CTC with CMMI level 1, 2, 3 and good start up SAP consulting firms.
Work Location: PAN India
Make use of it, as an entry into SAP is always hard, this opportunity will let you make a solid entry.