I like the idea of providing mom some information.

Here's another one. Find yourself a support group. Many allow a new participant to bring along a family member or other support person to the first meeting or two. This I have seen happen in my own group. Generally it is positive - even when the person brought has come reluctantly. Often what happens is at the end of the meeting the support person expresses that they just didn't know and weren't aware. Usually what follows is an expression of gratitude.

If you are seeing a professional perhaps think of taking your mother to a session.

And the act of letting your mother know you are seeking such group support and help ought to send the message this is a serious matter.

I do not know your age and this impacts my ideas. For, if you are a youth and seeking out assistance that would be different than being an adult and more easily able to access supports on your own. If you are in fact a youth, start with your school guidance counsellor.