I know very little about stock trading. I shouldn't get in a world of financial pain if I don't trade on margin (Robinhood Gold Buying Power) and only transfer money I can afford to lose right?

That is treating Robinhood like a casino. I recognize I don't know what I'm doing at the casino. Therefore I don't use a credit card to buy casino chips and I have a hard stop-loss of a couple hundred bucks that's budgeted as entertainment money.