OK, I will explain.
The single most important thing you have to concentrate on is limiting losses.
You do this by using stops.
As you become more procicient at picking winning moves you have to tighten your stop loss policy.
Limiting losses to the absolute minimum is the key. All else is peripheral.
Now that is a simple statement.
If everyone did this, everyone would survive long enough to eventually become proficient.
But very few have the self discipline to persist in this way.
I strongly suggest you follow the lead I have just given you.