Yes, it is possible to pursue an LLB after completing your 12th. There are two main paths available: a 5-year integrated LLB program or a 3-year LLB course. The 5-year program is more common and includes a combination of law studies and undergraduate courses, allowing students to graduate with a law degree. You should have passed your 12th with some percentage. And many of the law schools are taking the entrance exams of students to give admission. In addition, you may choose a normal undergraduate course, then apply for the 3-year LLB program after you have finished your undergraduate course.
Both programs provide excellent legal learning and avail various opportunities in law careers like advocacy, legal consultancy, corporate law, or judiciary. The eligibility criteria and entrance examinations for the preferred law colleges are different and should be researched upon. It is also an early career start in law if one is sure of his or her interest in this field. An LLB directly after 12th is taken as an advantage.