When going into a job interview, you may feel self-conscious and nervous. The goal is to be ready for it so you can talk to them and appear confident. Part of how to prepare for an interview is to practice.
Practice talking in front of the mirror or record yourself to review. Don't be overly critical but do focus on what you see. If you aren't making eye contact, you need to strive to do so at the job interviews. If you rush to answer job interview questions, practice taking a breath in and out and then talking at a normal pace. The more you practice, the more natural you will appear during a job interview. You CAN do this!
Work with a professional to practice an interview. It is always to your advantage to prepare for a job interview, with a friend that will provide helpful feedback from a mock interview. With their guidance, you can avoid common mistakes.