LLB

Yes, a 3 year LLB Distance Education should be enough to provide the necessary legal knowledge, as the Bar Council of India does not recognize this degree, you can not go for the AIBE exam, which is a prerequisite to start practicing Law in India. Spending more than 3 years in the distance LLB program would not be a suitable choice.

See, the Bar Council of India does not allow any distance programs or degrees to pursue the AIBE exam, which is mandatory to practice Law in India. So, if you have plans to serve in the judiciary services, there's no point wasting your 3-5 years in a distance program.
However, if you just want to gain some legal knowledge or maybe upskill, then it's a good choice. For example, if you're interested in Legal Journalism or are already in the field, a distance LLB degree will give you the flexibility to work as well as gain knowledge about the Law.