Hello,
I am sorry to say that your marks is very dear student to admission in any government college in India. If you got 450 to 600 marks then you will have a good chance but with this marks you can apply for any private college or give next year exam with a solid preparation.
In order to know more details about qualifying cutoff for the government colleges, please go through the link given below
https://medicine.careers360.com/articles/neet-cut-off-for-government-colleges
In order to predict your college with this marks, you can use the link given below
NEET 2020 College Predictor – Know your College Admission Chances Base ...
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