Who is the person to speak to first when one wanted to be engaged to someone

Assalamualaikum waramatullahi wabarakatuhu I want to ask of the rule of getting engaged with someone, that should that person speak to the girl first or her parents or his parents and if is that girl in which manner should he speak to her, Bec many people said it is Haram to have a conversation with a female that you are not related to Wa Salam