Achieving any amount of success in the market is tough. In fact, the data says it is near impossible. If only one in a few thousand trader is somewhat successful, then that is indeed near impossible.
I have one friend who did the same. He set a small intraday target. But he failed for two reasons:
1) The expense ratio is very high. If strike rate is 50%, then per profitable trade will cost you 4 points. Meaning, if your target is Rs.8, then you are losing 50% of your profit even before it comes into your pocket.... a big problem.
2) One bad day can be destructive. It shook him out of his boots. He held beyond his SL (praying and hoping) but market moved majorly against. He stopped trading after a few weeks of disorientation.
All I am saying is, it is doable..... but a statistical aberration.