8 hours per day

internship

Motherfucker that's a whole ass full-time job lmao. "Internship." Tell them to get the fuck out of here with that nonsense. They want you to have full qualifications yet want to treat you like you're a student in need of some extra credits.

I don't know your situation or what the market looks like in India but personally I'd say if you won't be homeless without it then run far away from this garbage job. You won't be there long either way, and your lifespan will be reduced by much more than the actual time you spend employed there

I've been in the software industry in a few western countries and have heard a little about India's

Does India do reference calls with previous employers? If no, just take the internship, do the bare minimum to not get fired and keep your sanity + dignity, smack that on your resume, and lie to make it more impressive if you want to

The goal being to find a healthier job later on which will be easier after this internship

Op, if you feel like this is a bad option then don't do it. You also have the power to reject. Look for something else, something more 'humane', rather than working your ass off for pennies - you have your own expenses to pay.