Yes we must have confidence in our strategy and don't be afraid of trading with our strategy. You would not be able to develop your strategy if you would not going to use it. So it is important to learn your strategy well. So that you can correct your mistakes.
The best way to have confidence in your strategy is to test it thoroughly in demo account mode until you can see good results over time from using it there. You can them move onto the real account and implement in here because you have seen success of using it and then put it to the test.