You should start a SIP(Systematic Investment Plan) because:
1.Small Amount,big corpus- Even rs 500-1000 per month can grow into a large amount over time through compounding.
2.Disciplined investing - Builds a regular saving habit automatically.
3.Power of compounding- Your money earns returns, and those returns earns more returns.
4.Rupee cost averaging - You buy more units when market is low and fewer when high.
5.Financial goal planning- helps achieve goals like child education, retirement, house, etc.
Start early, stay consistent, think long term.