I am not confident simply becuase I don't know who I will be competing against, when I got my part time job 7 others were also interviewed, that was just for 4 week job at the time (but they kept me on).

I do have some niche's I will need to produce a new site to demonstrate it becuase mine is crap, but I think I have a greater understanding of web standards and accessability than most the people I will be competing against, and this is one way I aim to sell myself, as its becoming more and more relevent thanks to changes in the law.