Before applying for careers like this, make sure you are capable with the tools/languages you'll be using. Be open and honest about your skill levels (I told the director my level of skill with SQL is only 5-6/10, but my background with software development and web development means I can pick up these types of skills more quickly). Also, make sure you understand what this position means to you (for me, this is a career and my biggest step forward in professional development) before interviewing so they will know if you are serious about finding a career or just wasting their time.