We went to Vanuatu with a 3 month old (and a nearly 2 yo). We have been overseas twice since. TBH travelling with a baby is easier than with a toddler. It is much harder to keep a toddler still and occupied on a flight!

I recommend that you take a good quality sling and wear your baby most of the time. That makes things much easier. Also, don't forget to always have a change of clothes with you - for you as well as baby jic you are vomitted or pooed on!