It is not possible that you can secure a government seat at Ayurved Mahavidyalaya Nashik college with a NEET score of 300, as the cut-off for government Ayurvedic colleges is usually much higher usually a score closer to 500 or above even in states too its not sure

However a score of 300 might only be sufficient for a private college seat in most cases so you can apply to private colleges with your score.if you want BAMS degree then you should get admission in good private colleges which has fees upto 5 lakh rupees.