Graduation in Chemistry, Post Graduation in HR and now you want to do DBA or DW. Your profile would not be able to fetch you interview calls – as it will not convince the recruiter (yourself being one for last 3 years, would you shortlist for a DBA position or DWH developer position a person with such a diversified and somewhat non relevant backgrounds?).
Since you have 3yrs experience, try SAP HR OR PeopleSoft HRMS modules. Future definitely looks much bright as your qualification, experience matches with the kind of course you have done.