Trading can be highly risky that’s why beginners as much as possible should stay away from trading. However, we can’t stop these people to enter trading if they really insist to try trading, hence they should practice high caution, otherwise trading can only be a waste of time and money.
Well, beginners should stay away from doing trading but they can still learn trading by watching good videos by famous traders and or by reading trading related books, and then they can start testing the market with demo accounts. Although, I never suggest anyone to use demo accounts but still when it comes to beginners who aren't financially good or who are students then in such case it's better to begin with demo account.
After learning principles of trading, a beginner should do trades with real money, I know the new trader will most probably lose money in his/her trading journey but from those losses he/she will learn that how he/she could have saved himself/herself from those losses by controlling his/her emotions during trading.