How long will it take to grow an afro?

Hello! This is my first post in this sub I am in the process of growing a afro since I want to try something new with my hair I’ve been washing my hair once a week, add hair oil and use a pick to pick it out when I’m done adding oil to it. I know it takes time for an afro to grow I’m just wondering how long will it take for it to grow and what should I wear at night?

Also what is my hair type? I know I’m asking alot of questions I want to make sure I’m doing everything right to achieve what I’m going for.