It was just fine to try to talk with your mom. But she may not be able to cope right now because of the stress of running the home and dealing with caring for so many people. If your father does not help, then it is all on her. She probably feels overwhelmed and may not have a place to go to relax or talk out her feelings. But your actions are fine. You are not meaning her any harm when you do try to talk with her. And she sounds like she tries to help when she can.
Your mom probably felt that the schizophrenia meant that you needed guidance and told what to do. Sometimes, parents feel the need to protect. And when their child is diagnosed with something like Schizophrenia, which they may not understand, they handle their feelings by making rules and being overprotective. But parents can take on the responsibility without understanding the stress they are under. Your mom may feel that everything is too much and she must have the answers to everything. That can make her angry and stressed.
If you can, try to approach her only with things you cannot work out yourself. See if you can help her here and there, and try to talk to her about things other than your diagnosis. That may help.
It makes sense that you would feel upset. No adult wants to be treated like their opinion doesn't matter.
You may want to try to make some decisions on your own outside of your home. Or take the initiative to do something on your own before your mother knows about it. Fix something, do a chore on your own, etc. It will raise your self esteem and let your mother know you are capable of more.
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