Keep it cheap, keep it simple, don't bet on the stocks to go up, don't do options or calls, only invest money you can afford to lose, only put money in stocks you know a bit about the industry the company operates in, pay attention to the news in general (don't read the stories on the stock itself, read what they say about the industry: aka, if you invest in shipping, pay attention to stories that complain about shipping delays from people who buy shit from overseas and to stories about crude oil prices.) Don't invest in tech, finance industry, MSM, and other woke industries, their money comes from idiots tossing money their way and hedgefunds. Since hedgefunds are losing money, it's the idiots who are about to get fleeced as those woke companies go under.

All your stock needs to be focused on long-term holdings. If you think a company will be around for a while, that might be something you want to invest in. A bad quarter or a bad couple years should not be able to kill the company.

Never expect to make money. It's always a pleasant surprise. The only way to actually guaranteed to make money is U.S. government bonds of the series I or EE, which actually increases in value through interest rates on the money you loaned the government, and it is always above inflation (what you put in will always be worth more than the value of inflation.)

Fidelity.com. It's my best offering. TD Ameritrade, Etrade, Robinhood, all the others, fees, fees, fees, sucker's bets, no information, bankruptcy waiting to happen.