Formula for newborn

SRM

Hi moms,

I’m pregnant with my first child who will be born any day now. I plan to breastfeed but I want a can of formula for backup just Incase I need it. Thing is, is that I dint know jack about picking out formula lol. Anyway my question to you is how did you go about choosing a formula for your newborn?? Which one did you like the most?? TIA