Usually the fear of making mistakes is behind this. Or maybe you are particularly shy. Both are common. That’s why you are in contact with your language teacher every day. You chat and practice together and you get to know him better. Soon it feels more like friendship, and you lose your fear of making mistakes. A mistake? You just laugh about it! Also, NELA lessons are always private. Just you and your language teacher. Experience shows that many students soon lose their fear of speaking and become real chatterboxes.