Im not quite there yet, but literally everyone feels this. You know what you know and you don't know what you don't know. Being an adult is figuring out how to distinguish between the two. If you're able to recognize that something isn't in your breadth of knowledge and you're able to consult with someone else who is more educated on the subject matter OR you're able to self-educate before applying your ignorance, then that makes you an adult in my eyes. Or at least is a large part of the bigger picture.