Hello girls, can you please tell me what experience do you have? We're…

Hello girls, can you please tell me what experience do you have? We're planning to travel abroad for the first time with a 7-month-old baby. How is it in flight? What should we take? What shouldn't we take? My child is on formula (we would like to know if we can bring formula). I would like to know everything in detail, as well as how the adaptation will be with the climate.