Hello Aspirant,
I hope you are doing well.
I don't think there is any law study materials available online in the Tamil language.
But you can use the help of Google translate and refer to the material given below:
https://law.careers360.com/download/ebooks
https://law.careers360.com/articles/best-books-for-mh-cet-law
I hope this helps.
Good luck.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile