I'm mostly an investor, rather than a trader, although I do trade a little.
For
trading, my advice is NOT to put any money into any stock that you can't afford to
lose. We're all geniuses in 2020, but this has been an unusually good year for the stock market. VERY few years are like this, so don't go by what you see today.
Somebody once asked some famous dead guy what he thought the market was going to do. The dead guy answered,
"I think the market will fluctuate." And of course, it did.
That quote has been attributed to John D. Rockefeller, J.P. Morgan, and others, and I don't know who actually said it -- but truer words were never spoken.
The other blinding flash of the obvious I will offer is
NEVER submit a "Market Order."
A market order means for the broker to buy or sell the stock at whatever price they can get. It's a classic rookie mistake, and can cost you bigtime in a volatile market. Learn the different types of orders and use the right one for what you're trying to do.
For research, I would avoid
YouTube like the plague. I'd stick with the well-known ratings firms like Morningstar (and others) and also with the major stock brokerages websites. I personally use Fidelity, and absolutely love them, but there are a number of other very good firms.
All of the major firms have both educational materials explaining things, and research tools. In most cases, you don't have to even be a customer to use their tools. When I go to Fidelity to look something up or research something, I don't even log into my account.
For transactions, I would use one of the major brokers who offer discounted trades. Before you sign up, find out what they charge for trades. At Fidelity, I don't pay any fees unless I buy a stock and then sell it within 30 days.
I would NOT use Robinhood because they just got sued by the SEC for deceptive trade practices with their clients.