Moses was called a 'priest' occasionally when he needed to perform certain acts (Psalm 99:6/Exodus 24:6), like when he called upon God's name(YHWH) interceding for Israel(Numbers 14:13-20), but that was not his normal position(Exodus 40:12+13/Hebrews 5:4). He had a different job. He was the 'anointed' of God(Hebrews 11:23-26)prefiguring Jesus(Acts 3:20-22), the 'mediator of the law covenant' between God and the Israelites, and had the responsibility of writing out the law(2Chronicles 34:14), seeing that it was delivered and carried out (Leviticus 21:1-4+10+11), and arranging for Aaron and his sons to act a priests (Leviticus 8:1-10:20)(Exodus 25:1+Exodus 28:1+40-43/Numbers 3:10) .
Moses married a daughter of Yitro, who was a priest in Midian.
Aaron
Moses was not a kohen (a priest) (1 Chronicles 23:14).
Aaron was Moses' older brother and the first High priest of the nation of Israel.
Moses' brother, Aaron
midian..with priest jethro
Aaron became a priest through a divine appointment by God. In the Old Testament, God selected Aaron, the brother of Moses, to serve as the first high priest of Israel. This appointment was part of God's plan for the organization and rituals of the Israelite priesthood.
Aaron was Moses's brother and the first high priest of the children of Israel.
Reuel (Ex 2:18) was the father-in-law of Moses more commonly known as Jethro (Ex 3:1).
Exodus 2:16 mentions, "the priest of Midʹi·an had seven daughters, and these came to draw water and to fill the troughs to water their father’s flock." Midian is where Moses sought refuge and was given Zippora in marriage. NWT
Aaron was the older brother of Moses. Moses stated that he didn't speak well, so God appointed Aaron as Moses' mouthpiece. Aaron helped Moses bring the people out of Egypt. He became the chief priest of Israel, by God's appointment.
Moses and Aaron were brothers in the biblical context. Moses was the leader and prophet, while Aaron served as the high priest and spokesperson for Moses. They worked together to lead the Israelites out of Egypt and towards the Promised Land.