You can apply for three years law programme after completed your Graduation. There are many universities offer the programme, Some of the top universities you can prefer for the programme like Faculty of Law Delhi University, Faculty of Law Banaras Hindu University etc. As per the eligibility you should have minnimum 50% in your Graduation as a general category. You can check its information with the given below link.

https://law.careers360.com/articles/du-llb-eligibility-criteria

https://law.careers360.com/articles/bhu-llb-eligibility-criteria

Any particular state if you wish to get admission then let me know.

Good Luck!