Maddie, good luck with your interview. I've recently been in the same place you are now, so I'll give you the advice I wish someone had given me.
One word: NETWORK.
You've gotten your degree and proven what you know. Now it's who you know that matters. And meeting people through networking is easy. People who are successful in their careers network all the time and are always interested in meeting people who are fresh out of school and just getting started in the field. Get yourself some business cards and go to a professional conference. Introduce yourself to people, tell them you're a job seeker, tell them where you went to school and what your professional goals are, politely ask if they'd like to look at your resume, exchange cards. As soon as you get home, go through all the cards you got and email everyone with your resume and a "pleased to meet you, thanks for your time" note. You'll hear back from some, and may get a few responses along the lines of, "Pleased to meet you. My colleague at ____ Company is looking to fill a position that would be a good match for your skills and interests. I have sent her your resume and recommended that she call you to see if you'd like to interview." That's a whole day of finding a good position to apply for and crafting the perfect cover letter replaced by a few minutes of meeting someone in person and emailing them your resume. And you've been recommended by someone more established in the field, which puts you ahead of the other candidates.
Do a variety of networking activities. Network with people more senior than you - they're well-connected and can give great advice. Network with people your own age who are also just starting out - you'll learn from each other's successes and failures, and help each other out. Pick a place where you'd really like to work and see if you can volunteer there. It's a good way to show you can do what you say you can do and meet people in the field, and there's always a chance it'll lead to a job there. Do some online networking too. Get on Twitter and follow people in your field. Start a blog where you write about something specific to your field. Create a personal (professionally oriented) website. Use your online networking to connect with people you hope to meet in person.
Seek out professional contacts who you have things in common with. People who will appreciate your strengths, relate to you, and accept you for who you are. These are the people who will be the most helpful.
Seriously, I sent out maybe 100 applications for jobs that were advertised online, didn't hear back from many, and was getting discouraged. Then I went to a few networking events and suddenly was getting recommended for positions that were a much better fit than anything I had applied for and that I would not have even been aware of had I not networked.
There are plenty of jobs out there. You just have to get out and meet the people who will help you find them.