We become proficient at what we repeatedly do
We become proficient at what we practice. If you are right handed is because you have used your right hand so many time that it have become better than your left hand. Same thing if you are left handed.
If you want to make money investing. You just need to take a calculated risk and just start. If you are repeatedly investing, as time passes you’ll become more and more proficient at it.
The more you do it the better you get at it. It’s that simple.
This apply to any human skill that we can think.