Salam - I’m struggling with facial hair and my mom says wait until marriage

Salam sisters, this is my first time writing about this and I really need some honest advice. I’m 19 and have been wanting to remove the facial hair on the sides of my face for a long time because it bothers me a lot. I’m just not sure how to handle it and I don’t feel brave enough to face the fallout alone. My mom has told me before, out of nowhere, “You can’t remove it until you get married.” I didn’t ask, she just said it in a normal chat and it’s stuck with me ever since. I tried to ask about removing arm hair back in middle school and she was furious, so I used a razor in secret until high school. When she found out she shamed me and said I was too young and behaving like I wanted marriage, but I kept shaving anyway. I don’t get this whole idea of waiting until marriage to remove facial hair. It feels like my life is being planned around some future wedding day. I know she grew up with those rules, but it still hurts that she tries to control what I do with my own face. What’s maddening is she lets my younger sister, who’s in middle school, remove her facial hair because my sister begged and my mom was worried she’d use a razor. So it feels unfair. I’m ashamed and scared to bring this up with my mom now - the way she reacted when I was younger left me with anxiety about it. And I’m nervous to do it alone because the face is sensitive and I’m worried something could go wrong. I’m thinking of telling her I’m going to remove it, and if she says no, telling her I’ll do it my own way anyway. If she still refuses to help, I’ll have to do it myself, so I need suggestions for methods that are gentle and low-risk. I’ve considered cold wax strips since they look simple and my sister uses them, or maybe going somewhere far away to get soft honey wax with strips. For context, the hair is thick and mainly on the sides of my face. Any tips on safer, less damaging removal options? Or advice on how to talk to my mom about this without it turning into a big fight? Jazakillah khair for reading and for any help ❤️