You need to choose the festival you want to premiere at, and to know exactly why your choice has fallen on a particular event and not another one.
It would be useful to make a list of all the festivals you’re interested to submit to, to promote your work. You can also be more specific and make two lists: one for the essential festivals you want to be part of, and another one for other events you are interested into.
It would be great to have a list of 50 festivals ready.
Remember that the premiere is one and only one: choose wisely. If you aspire to an Oscar, you need to look for festivals who have access to the Academy Awards.
When choosing festivals, be sure to ask yourself what those festivals can do for you.