Quick Overview
Trust in your own abilities and use the skills that you have. This is how you will lay the foundation for personal and professional growth.
Extended Overview
Embarrassment is often a result of fear; the fear of making a mistake. If you treat mistakes as learning experiences, then your sense of embarrassment will be lessened. It isn't easy to train yourself to embrace mistakes, but you can do it; and you'll be very glad that you did.
Career Overview
If two products are very similar, it's the small details that make all the difference. Don't neglect the small details; they could be your advantage.