Heya Saniya, 

Congrats for your score.

You have somewhat chances of getting admission into government colleges. You can check the previous trends of admissions and cutoffs of various government colleges using below provided link

https://www.google.com/amp/s/medicine.careers360.com/articles/neet-cut-off-for-government-colleges/amp

You can also use the predictor tool to predict the best suited colleges for you 

https://medicine.careers360.com/neet-college-predictor?icn=NEET_clgpd&ici=NEET_article_contmap

Hopee it helped. 

Hello Saniya, it is good to know that you have scored 458 marks in NEET 2019 from general category. But the availability of government MBBS seat in the government medical colleges depends upon the state in which you are having domicile. Generally the cutoffs are above 480 for general category.

Hope this answer gives you the information you required.