Hello student to become HR after completing BA program you can  pursue MBA in Human Resources.

You can appear in cat entrance examination to get admission into Public /private MBA colleges

Eligibility - Candidates must passed graduation in any discipline with minimum 50 percent marks or equivalent CGPA from a recognized university.

For more details refer to the link mentioned below - https://bschool.careers360.com/articles/cat-eligibility-criteria/amp

Feel free to comment if you've any doubt

Good luck