Hello Student,
As you have mentioned that you have scored 423 marks in NEET 2020 which is not a very good score to get a seat in government medical college through  AIQ but you can try mangement quota.

You can refer to the following article for a detailed view of management quota seats, the participating institutes and the eligibility criteria
https://medicine.careers360.com/articles/mbbs-admission-through-management-quota

and for other better prediction use This

Best of luck!