How to convince my mom to let me go bald?

Kai02
I am a 15 year old girl and I want to go bald.
First off: THIS IS NOT A POST ASKING "Should I go bald?"
I AM NOT ASKING FOR ANYONES OPINION ON IF I SHOULD OR NOT
I DO NOT CARE IF IT doesn't LOOK GOOD OR IF "guys won't like it"
I WANT TO GO BALD FOR ME, TO SAVE TIME AND BECAUSE I HONESTLY JUST HATE HAVING HAIR I FIND NO PROS IN HAVING IT PERSONALLY

Anyways, I want to shave my hair and my mom won't let me. It took me about 5 months to convince her to let me get a pixie cut and I do not regret it in the least bit and now I want to go a step further.

She is worried that I am going to say I am transgender next (She is transphobic,). I am not transgender I simply want to be bald because I find no joy in having hair, it is only a problem for me.
My question is how to convince her to let me? I don't know how to convince her that if I go bald I will cut back on time getting ready and will just generally be happier.
Updates
+1 y
A couple people suggested I should just do it but may problem isn't I won't "just do it", my problem is I'm not allowed to and I really don't want to shave it myself and get grounded until I'm 18. I want advice on how to convince my mother it isn't a terrible idea.
Updates
+1 y
Also donating it isn't an option since I already have a pixie cut...
How to convince my mom to let me go bald?
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