I am always nervous,tense,i feel fear always.Due to this problem i can't write neatly,learn fast,learn danc?

I think you may be experiencing anxiety. First of all you need to see a Doctor and tell them what your experiencing and how it's affecting you. There are medications that can help and also exercises that you can practice to help you relax. Look up some things on anxiety and see if it fits. Also are you in harm or is there a reason to be afraid? If so you need to find a safe place.