I need help with starting an important conversation with my mother.
What problems are you having with your mother that warrant a conversation?
She's always interrupting me with something I "need" to know
If her interrupting you is really that bad then you should tell her about it and I support this decision. It is important, and okay, to talk through your problems and try to fix them.
Yea I know, she just talks so much sometimes.
Try to take the time to talk to your mom when she needs an ear. You can also tell her that you are busy and set some designated times, such as dinner, to hear her out. She will appreciate the honesty and forwardness.