Hey riya .

First of all . Plan. Get famaliar with the pattern of the exam and its syllabus, go through previous question papers and understand the difficulty of the exam.

Now make a plan. Do not go overboard. for the first part which is aptitude which carries 120 marks you have to answer 120 questions in 60 minutes so thats 2 questions per minute. Try and develop speed. Understand and recognise repeated important topics and make notes while studying them.

REVISE.PRACTICE. the most important and the most ignored parts of a exam preparation. Practice until you attain your required score.

for the second part which is 2 drawing questions carying 40 marks each you will have 2 hours so while developing your artisctic skills develop your creative and observational skills. Learn to scale, propertionate and imagine dimensions from all directions and practice wih taking a single object and draw it from top, bottom, sides so that you understand how dimensions work.

for more information and tips go through the following link:

https://engineering.careers360.com/articles/how-prepare-for-nata-in-6-months

hope this helped.

all the best