Dear aspirant,

If you are aiming at viteee then prepare according to viteee syllabus and prepare practice papers of viteee.

Although syllabus for jee mains is nothing out of the box but the question level is different in mains. If you are able to solve jee mains questions ,then there is a good chance to do very well at viteee also.

Aiming at a particular thing is good but you should have back plans. I would recommend you should also prepare for jee mains!!