Your employers may not have the highest expectations due to your age, but that doesn't mean you can't show them they're wrong and exceed their expectations many times over. In doing so, you are not only securing a place within their organization for the future, but you are also securing an excellent reference to take with you where ever you may go.
Read through the Becoming the Ideal Employee PowerPoint and type up in MS Word, four strengths you currently possess and four weaknesses you plan to work on to become indispensable.