If you really want to found World Congress, you are actually better off researching Printing Press before Astronomy. (Indeed starting a Printing Press beeline right after you finish Education) Most AIs research Astronomy way before they research Printing Press. By getting Printing Press first if the AIs on the other main landmass research Astronomy and send a Caravel you have a better shot than if you first researched Astronomy.
However, I note that the human has the tie breaker on resolutions and so unless an AI has already built FP and a different AI is the initial host then the Human will be able to propose resolutions anyway, and in addition the usefulness depends upon victory type.
(For science victory, you really want science funding, but that's extremely unpopular with the AIs early and only becomes popular much later.
For diplomatic victory, building the FP which would require early Banking, will do more for this victory type than being the very first host.
It's really only cultural victory that what the AIs want in resolutions for the first two congresses match up well, but cultural victory is a lot less popular on deity level than lower levels.)