Preperation for interviews

Hi all,
I am learning MT and its really hard for me to get pass marks for each tests at the first attempt for each chapter..
I think it is because I am learning from home..
I fear now will I be able to face the interview?
Please give me some tips for the interview and how the interview will be..
What they expect from me?
They ask questions or transcription tests they conduct or how it will be?
Please help me..