When to go into maintenance?

Hey everyone! I am 54F, 5'4". I started in May 2024 at 230lbs. I am now down to 165lbs! Yay me! I'm currently on dose 12.5mg. My BMI is 28 (overweight). My goal is 150, but honestly I just picked a goal number outta my ssa. Lol. I have no idea how or when to know if I should go into maintenance mode 🤷🏽‍♀️. I could choose 145, 135, or 125 ( haven't seen that since I graduated HS 😆), but how do you figure it out??? Help....How did you decide to stop and go into maintenance and how do you determinewhat dose? Ahhhh😟