I hope this helps!!
I think experiences such as calling to make appointments for myself are experiences that make me feel more like an adult, because when you’re a kid your parents will be the ones to book you doctors appointments and hair dressers appointments so being the one to do it feels like you’re becoming more independent, also getting a job makes me feel more like an adult.
These events became a turning point in my life because they made me feel more independent, I could make my own decisions and choices and then using the money from my job I could back up those choices without help of any people older then me.
I realised I was growing up when not just other people were referring to me as an adult but I myself was.