Is there something to the ages 21 and 30?

Joseph was instated and started saving lives after years of preparation at the age of thirty!

Genesis 41:46 Joseph was thirty years old when he entered the service of Pharaoh king of Egypt. And Joseph went out from Pharaoh’s presence and traveled throughout Egypt.

This is so interesting to me as I started to ask the question of whether the Bible almost infers that age 21 is the start of adult accountability and 30 years old being a significant and symbolic instating year of now pouring out of that preparation as Jesus started his ministry at that point.

Joseph was another reaffirming cool random connection. Maybe there is something to preparing our choices wisely in our young adults preparation years before the age of 30.