Hi! I think some of the most helpful things I learned were to manage expectations and how to cope with losses. Realizing that everyone loses money at some point and that it's totally normal helped my confidence and learning when to take a break to relax and think things through after losing were crucial for me. Otherwise, you could make mistakes like revenge trading to try and make that money back. Good luck!
This is very basic yet crucial to your future success- Know your limits. It means one should know how much you’re willing to risk on each trade, setting your leverage ratio in accordance with your needs and never risking more than you can afford to lose.