Hello Aspirant,Hope you are doing well

As you have mentioned that you are at zero level ,so it will be very tough for you to score around 400 marks as NEET is considered as one of the toughest exams.But if you start your preparation and if you go through it consistently there might be a chance to crack NEET.

Some of the prepatration tips for the Entrance exam

1. Be familiar with the Syllabus.
2. High-Quality Study Material.
3. Create a Realistic Timetable.
4. Prepare Notes While Learning.
5. Revise Regularly.

For further details visit this

https://medicine.careers360.com/articles/neet-preparation-tips

Hope this helps you

ALL THE BEST