I am not wishing to be rude or provocative here, but I appear to be missing something in this post.
How did you get a job as HR Manager if you do not know how to be a HR Manager?
There are many postings here on CiteHR about people who get jobs and then come to the site to find out how to do their jobs!
This makes no sense to me.
The recruitment processes followed by Indian companies seems to be totally different to that followed by other countries. For example, here in Australia, we recruit, interview and employ on the basis that the candidate has the skills, experience, and capability to do the job.
As a Manager, you are going to have to exert some authority over staff members. If you do not have the skills and knowledge, some staff members may look for opportunities to take advantage of your weaknesses.
I wish you well in your new post.