You can start day trading by simply signing up for a brokerage account and accessing the trading platform offered by the brokerage house. Then, invest money to start day trading. However, day trading is a highly risky financial practice. Hence, you must first go through extensive learning via online or in-person courses. Then, you need to use trading simulators to test your day trading skills.  Once you feel that you should try the real trading desk and have some money lying around, you can enter the actual game. Remember, you must not invest money from the family or household budget.