Will I be a good mum for him

Hey everyone , just getting adjusted to motherhood. My sons a month old now , and I understand his cues better and needs but still learning, not always sure what to do or soothe him. I'm breastfeeding and want to continue. Although it's exhausting and frequent and I completely get it's a personal choice and no right or wrong way to feed a baby but I'd like to continue. I'm hoping it comes from a kind place but my mum and mil have been suggesting introducing formula. My mil has been amazing and helps at night time. This allows us to sleep but noticing now when wake up suggestions and opinions are provided very frequently on how to care for him. Tonight my advice was overruled and im trying not to get frustrated as i know she is wanting to help. My mum is complete opposite and somewhat absent at times with support I have been encouraging to be involved. Wont get into it but been through alot of hardship in the past year and I don't know if I'm being too harsh on myself. But how on earth do people do it ?! How to i not become a controlling mum. I want a balance want to do my best for him. And so appreciative of help but don't want to be told what to do. Am I being unreasonable