There isn't easy money to be made in general. Basically most day traders lose money because they get deluded into thinking this might be an easy way to make money, perhaps over a small sample size of trades that worked in their favour or perhaps because some "trading" article aimed at retail clients convinced them that they could beat the market by day trading. Perhaps they even have bad results on the slm, but that was all down to those couple of silly trades, they wouldn't have taken those trades for real... the other trades that went well were the proper ones etc...
There is a whole cottage industry out there of the blind leading the blind - generally focused on technical analysis - essentially statistics dumbed down/made easy and with lots of pseudoscience/dubious claims and subjective methods thrown in on top. They'll perhaps talk about risk management - this will be explained as some arbitrary rules "only risk X amount per trade because I said so". Obvs it will perhaps stop you from blowing up immediately. Then if you fail you'll perhaps be coaxed into thinking that it was down to "psychology" you perhaps made some mistakes, didn't follow your trading plan etc.. Problem is your trading plan based on some magic line crossing another but not when some other magical line is present or some subjective pattern emerges etc... probably doesn't give you an edge in the first place.
Other problem is lots of people tend to do this (in the UK at least) via CFD or SB firms offering a two way quote - so not only do you need an edge to beat the market (hard enough in itself) you have an additional obstacle to overcome too, no sticking orders in the order book and getting your buy order filled at the current bid etc.. you have to cross that spread the firm is giving you on order to buy/sell - sometimes that spread might not be much different to the underlying market, sometimes it could be a bit wider...
Essentially you'd be placing bets with a negative expectation, some of them will win some will lose but overall, in the long run, the cumulative effect is losing money.. just like if you were playing roulette or any other table game in a casino... or indeed if you were an amateur sat in a cash poker game with a bunch of pro players - in the long run you're bound to lose.