That's very correct, you have to remove fear within you to succeed in trading, but it is very necessary to start trading with a spare cash that one can afford to loose, until you perfect in trading.
Yes, and do not forget in terms of trading someone also needs knowledge, both knowledge in analyzing market conditions and knowledge in controlling the capital that he uses to trade in the market.
Yes knowledge is an integral part of trading; and we can learn very fast if we make ourselves open to correction.
Also, we need to understand that, there are no perfection every where in any aspect of the world; so learning daily and improving our intellectual skills or strategy in trading will go a long way.