Guidance on applying for HR Jobs and facing interviews

I have worked as an HR Executive in an educational institution where I did some assisting job to the Director. I learnt some basic HR functions from that office.
In order to gain further knowledge in the field of HR, I also did a six month HR Certifications course. Am I now eligible to apply for a corporate job in a company? I am very nervous to attend interviews for medium to high level companies.
Please guide me in this case.

Dear Angelin Anuradha,
Those who work in big companies are also ordinary mortals like you and me. Therefore, there is no need to get nervous as such.
A job candidate is selected based on qualification, skills, industry in which he/she has worked etc. You may apply for the post of HR Executive. However, make sure not to take a job where you will be all alone. Take a job where some senior is there to guide you.
Go and appear for the interview with complete confidence. Numerous job candidates are selected because of their potential and not necessarily on their experience. Possibly your candidature may be turned down because of lack of experience but then somewhere some luck will click. Have a faith on yourself and move forward!
All the best!
Dinesh Divekar