As for my opinion, a newbie should do a research first. Do not engage in trading right away. Try the faucets or small investments that is according to your research to avoid beng scammed. Build your knowledge first to prevent your money from being gone.
You can play around with some money even as a newbie, just don't make bold moves. As a rule maybe take 10% of what you are willing to invest (and lose) and trade a little bit. It also improves your understanding of things work on the trading side.