It sounds like you are struggling under the weight of some tough feelings.
I’m much older than you and I struggle with this.
One thing I can tell you is that you already have some amount of self love inside of you. The mere fact that you are reaching out for help demonstrates that you are trying to help yourself, which is a reflection of self love, or at least self care or self preservation.
Here are two suggestions I can offer: one, use cognitive therapy tools to examine your negative thoughts behind your feelings of self hate. There is a great free app called Feeling Great that is based off the work of Dr. David Burns, a renowned psychiatrist. You may find that changing your thoughts will change your feelings of self-hate.
A second idea is, don’t try to switch from self hate to self love right away. Can you find something in the middle? Can you find something about yourself that is okay or tolerable? If you enjoy yoga, you may like the practice of Ahimsa, or the concept of non-harming. This applies to our inner experience as well as the external world.
Finally I wish you well and please know you are not alone. I hope you find a better path forward soon, but it can be the work of a lifetime. I know it sounds corny but there is no destination, it’s all the journey.

Keep talking to your mom, especially if things don’t improve on your own, and ask her to help you seek professional support if needed.