Hello rakesh,

Getting into law course is available through two way i.e. 3 year course LLB (only graduates can apply for this course) 5 year course BBA+LLB/Bcom +LLB (12th passed student can only do this course).

Getting into any law course is done through entrance exams such as CLAT,MH CET law entrance,APLAW CET,TS LAW CET,LSAT,SLAT(symbosis college exam)

Detailed information about various entrance exam is given in the link :

https://law.careers360.com/exams

Preparation for every law entrance exam is same 

Verbal ability

Quant (for 5 year course only)

Current affairs

Legal aptitude

You can also refer the link to get idea of preparation tips :

https://law.careers360.com/articles/clat-2019

Hope I helped you.All the best for future endeavour!!