How can someone retire at an early age?

What does it feel like to retire extremely early?

What is the best way to save money and retire early in India?

I am a 24 year old earning 80k per month after taxes. My monthly needs can be fulfilled under 16-18k. What is the best way to invest?

What should a 48 years old woman study who has no degree and never worked, to be able to save money later for retirement?

How does it feel to retire in mid 40’s and shift from a metro to a small town, be dependent on income from house rent and investments enough to sustain a family of 4?