There are strategies and concepts that are easy to understand, easy to implement and most importantly which work, also on top of that there are also more complex one that works all the time but they are hard to understand without some knowledge in finances. Basic concept is knowledge without it its not possible to work. Next there are emotions that need to be controlled when something you invested went sky high and how to maintain this, also dont be scared when you see that your investment went down.
Most of the time we are scared with thing we dont understand this is normal, but with some experience and knowledge with practice off course we all overcomes setback in this.