The most important thing I wish I had known when I started trading:
There is no perfect strategy.
Many things work.
Some strategies work better under certain conditions.
Other strategies work better under different conditions.
Some strategies will be more or less compatible with your personal qualities, which can directly affect their profitability.
And all of this will change over time.
Every strategy has its strengths and weaknesses, as well as inherent trade-offs at any given moment.
Searching for what works sometimes can be more fruitful than searching for what works all the time.
Think about it.