There are no such thing that lawyers don't earn. Infact lawyers earn good if they have the skill and knowledge which are required to establish them as a lawyer. So never believe on this rumours and keep studying. If its your passion then you will obviously do the best in the profession.

CLAT is one of the famous examination for Law in India. Apart from that there are a lot of exams which you can see by following the link below:

https://law.careers360.com/exams

I hope my answer helps. All the very best for your future endeavors!