I have super high expectations for myself as a mother already and now 2nd baby is on the way, I'm…

I have super high expectations for myself as a mother already and now 2nd baby is on the way, I'm terrified to fail in any kind of way.. I only want to give my children the best and make sure I give them equal attention and love. I feel overwhelmed and anxious about restarting this journey, in ways I feel like I've failed with my daughter but I don't know how to shake this feeling. I genuinely want to be one of the best.