There is no criteria for the ayurvedic admissions like medical and dental courses. You have to apply online thorugh the website and then the choices are filled and the merit list will be prepared for the candidates according to the marks obtained. Also with the low marks you cannot expact some good colleges and you have to go for the paid private colleges in your state. You can get the seat but some compromise has to made with the college dur to low marks. Refer the link below for the information about the ayurvedic colleges in Himachal pradesh.

https://targetstudy.com/colleges/private-ayurvedic-colleges-in-himachal-pradesh.html