Weaning

Hey all! I’m planning on weaning my son from breastfeeding. He’s 15 months. He wakes up 3-4 times a night to nurse :(. I’m currently a SAHM but will start a part time job within the next month. Throughout the day I nurse him before his nap and before bed in addition to the night feedings. I would love to start with the night weaning first and eventually stop breastfeeding before he’s 1 1/2 years old. Do you have any suggestions on how to night wean or decrease milk supply so I don’t look like this GIF below? 😂 Thanks in advance!