Sometimes when you learn something new it can be quite scary. When you think you know what you are doing, it can still take a couple of attempts to get it right. Then the unexpected may catch you out!
What is important though, is that you don’t give up. Use all the resources available to you and learn all you can. Then as your confidence grows, you can tailor your approach and use your initiative to come up with improved solutions.
I think this wonderful short from Pixar says it all….