Mom treating me like crap because I want to move out...

So, I’m 28 (yes I know I’m too old to be living at home) but I’ve finally came to the decision.... I NEED TO MOVE OUT! I’ve been so afraid of failing If I live on my own but honestly I won’t know until I try. I’m sick of my mom treating me like I’m 16. I have a curfew on the weekend. Have to ask permission to do certain things. My brother has his girlfriend over every day and they’re loud at 9:30-10 at night when I’m up at 5:30 in the morning. My mom cries over.... wait for this.... washing powder. So I buy my own? She decides to take it to wash her and my brothers clothes. I pay all my bills plus rent and part of the light bill. I made the decision to move out and now she’s telling me how big of a mistake I’m making then sarcastically tells me she’s happy for me. Then throws empty boxes in my room and tells me to have everything packed my April 1st. Or how I should make the attic my own apartment. This is the main reason I want to move out.... she screamed at me one day and said I was being bipolar because I didn’t want to go out to eat with them... mind you I was in psych for nursing school and can tell you the exact signs of bipolar... it’s the stuff like that. Sorry I just need to vent 😓. I don’t think it’s so bad I want to try and be on my own. But I must be wrong.