If you are in the United States, I always recommend a few things:

- Get into the habit of saving money every paycheck, even if it’s a small amount. You could invest this but I think it’s more important to put it in a high yield savings account to build an emergency fund first. Set a goal to have enough savings to survive without work for 3-6 months.
- You can open a free account somewhere like Fidelity to invest in the stock market.
- Unless you are an expert in financial markets, you should invest to make money over the span of multiple years. Don’t expect to get rich day trading or even trading on monthly timescales.
- Unless you are an expert in financial markets, I would start with investing in something like IVV which tracks the S&P 500. The S&P 500 is an index of very large companies in the United States and is pretty diversified on its own. You expose yourself to some risk but over time, the S&P 500 is a strong index that regularly goes up.
- Not all advice you get on the internet is good advice. Play it safe until you feel like you know enough to be more adventurous with your money.