How can I know my prakruti? whether I am Vata, Pitta or Kapha or mix of them?
To know Prakruti, we must know that पञ्चमहाभूत responsible for each dosha.
In your environment, try to be with different forms of nature. Be sensitive. Spend time with nature daily. Maa speaks language of silence. Listen her carefully. Connect your billion+ body cells with Maa. Surrender to her. Worship here daily.
There are signs and ways documented to know someone’s Prakruti but I prefer being with self and seamlessly submerge in the Universe daily to realize own Prakruti. It is good way restore balance of tridosha while realizing nature of self.