There are a couple of excellent internet references to help you understand your elemental nature, or constitution, along with the Ayurvedic time clock - the times of the day, the seasons of the year, and the stages of our lives - and how these external elements effect you. If you are going to attempt to begin to understand your constitution online, I suggest trying Yoga International's dosha quiz! If you are trying to understand the concept of elements in Ayurveda, I recommend watching Yoga International's Ayurvedic time clock video series! I am including both links below for your convenience:
https://yogainternational.com/article/view/dosha-quiz?utm_content=bufferfc33f&utm_medium=social&utm_source=facebook.com&utm_campaign=buffer
https://yogainternational.com/guide/the-psychology-of-ayurveda-and-the-physiology-of-yoga?utm_content=buffer63648&utm_medium=social&utm_source=facebook.com&utm_campaign=buffer