Is this is a good Day Trading Strat?

Hi, I'm new with options but I recently watched a video of a guy explaining how to be a profitable day trader, and the strategy is to buy 2-3DTE SPY options $3 from strike price when you feel the price will go up or down because of support and resistance and also when the 9 and 21 moving average converge, and also when volume seems to be heading in a certain direction. Is this a good strat, and is there anything I can add to it to make it even better?