Try to not give up. Your self esteem and what other people think of you and possible job security depend upon this. It is not bad to be afraid some times. Sometimes fear is a motivator.
Let me tell you that this course really made my socks roll up and down. I am really, really, impressed. Wolfson comes across as having a passion for the subject. He is really knows what he is talking about. The lesson progression from basic toward the more complex is excellent to the point of perfect. As a result, the course outline is very well laid out.