Welcome to LQ!!
I strongly recommended removing your e-mail address---you are inviting a spam attack. Also, this forum operates by posting answers for all to see---do not expect people to e-mail you privately.
The first thing you need to do is install Linux and start using it. Depending on your background, you might learn what you need in a week-----or it could take many months. (You have not told us what kind of a job you will be interviewing for.....)