SIP vs lumpsum, confusion...

My father recently sold some agricultural land and received 20-30 Lakh after deducting some loans, emi,and policy. I am very early into mutual funds (1 year), I am looking to invest this amount for wealth increase and preservation and as emergency fund. When I looked into some index, small cap, elss funds . I am noticing that I received more than 100% returns in lumpsum than SIP returns (considering more than 5 yr of investment period). Since I have decent pool of money. Which investment strategy suits best for me. Or that money calculator is showing me tentative amount based on today's market conditions... It's a very big amount for investment so I need some diverse (including high risk funds, liquid fund) portfolio....

I am 23 y.o. Will be joining MNC as a fresher with 25-30 k as my in-hand salary. So I can take responsibility to sustain my family. (Since father closed his business due to severe loss in corona).