Doods - How can i create / add a model

I am new to picture recognition and all that stuff.
I have Hassio OS on RPi4 and installed Doods, its working. (sometimes with weird recognitions even at 50% but okay…)

Could someone describe a simple way to add a new “specification” to it? Or maybe its super complicated?

I watch my turtles in my garden and want it to tell me when a turtle is seen.