Hello there

It doesn't requires that much of separate study. Just recap all the things which you've studied in class 11th and 12th. Also try to solve many previous year question papers just to be aware that what type of questions are asked and what is the exam pattern. Mostly the syllabus overlaps with the CBSE syllabus so if you're a state board student then I would suggest you to focus on CBSE too.

In short VITEEE isn't that much hard but you've to keep your dedication and patience throughout the whole preparation.

Refer this link for more tips about preparation:

https://engineering.careers360.com/articles/viteee-preparation-tips

I hope it helps you!

Good luck!