first time traveling with a baby HELP !!!!.

Hello ladies I have a 7 and a half baby now and by the time we will travel she'll be 10 months old. And it's going to be a long flight. I'd like to ask what is the best diaper bag to take it with me ?. And how can I manage her food ?. I mean what should I take with me and how many ?. And how about formula milk how much can I take with me in the airplane?. And what about the baby Carrier which one do you recommend me to use ?. I'm super worried I've never traveled with a baby before I don't know if I can do it ?. Any tips and tricks please feel free to share it with me !!!!. Thank you 💙💙.