Breastfeeding tips

My baby is 2 days only now and is having a right time latching to my boobs I really wanted to stick to only breastfeeding but his so Hungry I had to give him hospital formula I’m not agains it but I want to breast feed my milk hasn’t came in either any tips? How long did it take for you milk to come in? I really want to keep trying! Am I out from breast feeding since his only been on formula for two days now