Help?

So my baby is a week and a day old and I am going to be breastfeeding I really wanna do it Strongly ..But I think I wanna bottle feed too if that make sense breastfeeding is hard and I know me and the baby are going to get it down pack but those nights I’m just super tired haven’t pumped any milk and breast are sore I just wanna have a quick go to so she doesn’t get to fussy from being hungry don’t judge me 😩can you do both? Can she get sick from doing both? This is the milk I wanna try