After learning the first, it is important to learn the second else you will be a trader with a strategy that should work, but no profit to show for it. When you hear of traders who were successfully able flip small account sizes to big ones in a short time, it is not just because of their strategy alone, it is also due to understanding of how to maximize profits and minimize loss.
Maximizing profits is one thing I wanted to learn in trading. After got some profits from trading I have alwasy a tendency to cashout sometimes rather than invest or reroll it as capital on trading again since Ive got plenty of experience losing those profits than cashing them out instead. I like the strategy but isnt those are general advise.
I think you have problem maximizing profits because you wants it when you dont actually need the outcome for spending, its no crime leaving your profit in your portfolio while the value changes, the moments you create the urge of cashing out your profits while innerly there is no strong reason for that is doom to collapse over time.
Once such strategy is developed, the act of been selfish with your profits is developed, you will eventually have a successful trading career.