Insecurities I have

Iknow this may sound weird but I'm really insecure about my body😟 and just want to know if I'll be able to breastfeed my daughter , does boob size matter 😖 I'm an a cup and it makes me insecure.. , when people ask me if I'm going to breastfeed I tell them "no" but I really want to😓 I just don't know if my boob size will produce any milk . Plz help