Needing advice about breastfeeding

Ok mamas! I’m needing to know all the tips and tricks and do’s and don’ts on bringing breastmilk with you internationally? And pumping and just breastfeeding in general? Super nervous as I have never done this before so this will be all new to me and we will be flying Delta, if that makes a difference !?I’m so scared that this trip will make or break my breastfeeding journey that I’ve worked so hard on!!