New Job, No HR Policies: How Do I Start Streamlining the System?

I have recently joined a new company after a long gap. The company where I have joined is running like an old firm, and there are no policies as such. I want to streamline the entire process and system of HR. I need appropriate guidance on where I should start and how to implement an HR system.

Hi,

Kindly go through the attached file. I hope it will be useful.

Thank you.