Hello Aspirant, Hope you are doing good.
Yes you can start your education.

There is no upper age limit to be eligible for LLB .You must pass your 12th board exam with at least 45% marks while SC and ST category students need only 40% marks. Finally you need to get your documents verified and then you can get admission in the alloted college.

LLB can be pursued in both ways 3 year LLB after graduation and 5 year Integrated LLB ( After intermediate).

There are several exams conducted by National wide, state wide and University level exams.
Entrance exams like CLAT,SLAT,AILET, STATE LAWCET , LPU NEST ,KIIT, Christ law entrance exam and many other.

For more information can visit the link given below.
https://www.careers360.com/courses/law-course

Hope this information helps you.
All the best.