Hello,

You should work On your communication skills .

You should have confidence in your self and learn how to answer well to each question asked .

Prepare for interviews by talking to more and more people .

Ask your parents to conduct interview for you .

In this way you can achieve self confidence.

Best wishes 

• know the job description
• Why your being interviewed, the motive behind it
• Do good research regarding the company and role you are applying for
• Practice your speaking skill and work on your body language
• Conduct mock interviews