It might have been true 10-12 years ago, you could have played with daytrading and make a living being a market maker. Buying at the bid and selling at the ask. No more I don't think. Now you are just playing a zero sum game with other daytraders, with a portion of every pot going to the professional marketmakers. So it's like being a poker player. The house gets it's take of course. But the skill level at the table varies. So unless the noob get's really, really lucky, he'll get taken to the cleaners.
No doubt, you will have to learn and make educated choices but honestly day trading isn't rocket science like they make it out to be. You need to know 12-20 stocks and watch them. Pick a variable group between tech, green, financial, industrial etc and learn how they behave. Memorize the important dates on their calender, and how the weekly announcements and government moves affect them and it becomes like clockwork. When BoA drops over a dollar in a week or two it will likely rebound as people realize the relative worth of the stock in comparison to the long term viability of the company. Honestly, some stocks you can get for a steal right now. Long term investors should not be picking up gold, they can easily outpace inflation in the market. The hardest thing is not playing with your whole deck, make a rule to only have 75% of your money illiquid at any moment. Makes you think harder about what you are investing in.