Now you know what it is, but you need to know that day trading is not easy for most of the people. I advise you first to get into the usual trading or long term trading as we call it, just to feel the whole thing. After you get some experience you could do this one too if you like it.
I agree with you that you need to try long term trading to determine which offers a better return of investment. Day trading is a hassle on the part of the trader. Need to monitor price change more intensely. Thus, try both trading methods to increase trader's knowledge that will surely help you in this market.