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Congratulations on your job interview. It means you're under consideration because you've got what it takes.
Have you done any spell work before? The spell you reference looks easy enough for any experience level, so you should be fine. As you do the spell, say positive things about your work experience and abilities, past achievements you've done, and tie these thoughts into each stage of the spell. Use your creativity here.
I think the spell will help your subconscious mind, and will boost your confidence, and as you carry the items in your purse. Every spell is an adventure. Enjoy the process. Your joy about life will carry over in your interview. People like to work with positive, upbeat people. Use a sense of humor, that always helps. You'll do great.
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