Agreed. Learning comes from doing; it'll get easier and to a point where you'll be neverous about the interaction, naturally, but at least you'll know what to say when asked certain questions so take you time. Acknowledge your weaknesses because we all have them. Be positive and confident in your ability to give something unique to the company you're interviewing for what's the point of being there otherwise. There's no better time to speak up than now. Good luck!