Dear Priya,
Please don't get rattled when people point out that HR differs from sector to sector or some specialized skill is required for a particular sector.
While there is some truth in it, to some extent, especially when we think of HR interventions, employee engagement, HRIS, incentive and compensation management, etc.; at the basic level, all are the same.
HRM is basically the management of employees, and all employees in any sector are humans :) What distinguishes them are their educational and skills level, their aspirations and expectations at an economic level, what would make for a motivated and engaged employee, etc.
And yes, there are specific Acts and rules for certain sectors.
However, at the very basic level, when you intend to set up an HR dept., the assignment essentially remains the same, irrespective of which sector you are in. The sectoral differences and their specialties will kick in later in the organizational HR life cycle.
Since you already have the experience of setting up an HR dept., albeit in a different sector, you are well advised to leverage your acquired experience.
Also, study the work processes of the new company, employees' profiles and job descriptions, manpower planning, and its linkage with the vision, mission, and strategies of the company, and other relevant information.
On the RHS of this page, you will find links and pages of Related Information. Browse through them and enlighten yourself.
If you still find yourself in trouble, please revert back. Please do not expect anyone to do it for you or look for a ready-made packaged solution. All organizations are different and unique, just like human beings. Moreover, this is not a one-shot job but a continuous process. You will have to keep redrafting, revising, and refining it till it serves the purpose of your company, rather than just simply look good on paper.
You will need others in different departments to collaborate with you. There will be several bottlenecks and minor hiccups as you proceed through uncharted waters. Wishing you all the best on your journey.
Warm regards.