In vit application form ,they asked about what is the choice of college branch and I entered as vit Amaravati ..I will not get in Vellore??

You don't need to worry about this matter as at the time of counselling you will be again given the oppportunity of Choosing a VIT UNIVERSITY campuses.You just need to focus on VITEEE preparation. You can solve previous years questions for practice and to enhance your skills.You can focus on ncert books for your preparation.As questions will be based on ncert and will be easy.