scared to tell mom

so i’m 19 and moving out from my moms soon. we sign the lease friday and i have yet to tell my mom. my daughter is 1 and any time i have mentioned moving out in the past, my mom gets angry and starts trying to make me feel guilty because “she’ll never see me anymore.” i’m gonna live about 10 minutes away and still come over on her days off. i’m nervous on how to even bring up the conversation, let alone tell her i’m leaving. also, any tips on things i should buy that you wouldn’t normally think of when moving would be very appreciated. thank you in advance.