If you want to get a credit card but don't have a credit card yet - you can't try your luck with a prepaid credit card, a secured credit card, or an add-on card.
This way you can start building your credit score and shift to a regular credit card.
Broadly speaking, you need to earn at least ₹1 lakh per annum to qualify for a credit card. If you are self-employed, then you might need to show a higher bank balance more consistently than if you are on a company payroll before your application gets approved!