What advice would you give a newbie that started trading?
Only one advice, control your emotions during wins or losses. Newbies often develop false beliefs that they could earn millions from trading and that we all know isn't true because in actual it's not that easy to earn millions from trading, not just from trading but from any other business.
If a trader learns to control his/her emotions then that trader understands that trading like other businesses can give profits but only to those who take it seriously and give proper time to understand the market and its volatility.
Overtime, and with compounding the newbie trader can also become a good traders who earns enough on daily to monthly basis, but only if he/she has controlled his/her emotions and learnt the market in the best way possible.
I agree with you, in trading or anything, controlling emotions is very important. Looking for a shortcut to get rich quick is always a bad decision, but beginners often make exactly this mistake.
They think of trading as the best way to get rich quick, which later leads to big losses.
In a risky place like trading, it is impossible to survive in trading, without experience, without having the right strategy, and without controlling emotions.
So a trading apprentice must first be educated about trading, be disciplined, and always have a learning attitude. And when you make a mistake somewhere, you must first find out the reason for that mistake, and be careful.