"If this trades doesn't go as planned, will I still be able to sleep at night?"
This is why I trade using limited margin around 1-5% of my portfolio, in case of things went really wrong i'm not losing anything, that 1-5% loss I can recoup back in no time and therefore I can sleep at night.
I always prefer building profit slowly than in one fell swoop only to get liquidated later.
Risk management is the key that people often overlook just because they become greedy and become FOMO.
The problem is, practicing proper risk management is often overlook because for them, their confidence to trade will help them build their trading profits, not realizing that any time their trades will not go as planned, and will fail to give them consistent profits.
For me, experience is the key. If they won’t lose in the process, then they will never realize the realities about trading and they will never gain a lesson that they can benefit throughout their trading career.