In eligibility interview they will ask you basic questions, they won't ask you why you are applying for refugee or from whom you fear, because these questions will be asked to you during your hearing. Anyway anything you will say it in this interview keep it in your mind and be honest.
They just want to confirm that you are still going to be in trouble or fear to be killed or abused if you go back to your country or not, in this case you would say yes I can't go back to my country. They will give you the refugee ID the yellow paper and tell you that you would receive WP within two to 4 weeks. if they haven't seized your home country passport in the biometrics appointment then they will this time. You will have to wait for one or two hours but when it is your turn that's basically all that happens for this interview.