Have you taken a look at the wiki page for Fedora Women Day? It contains details on how to organize it.
You need to create a wiki page for the event and some other things. Please note, the deadline to confirm your participation as an event organizer is on Aug 20 i.e. in a week.
Additionaly, read this Community Blog post too, to have a better idea about the event.
Also, diversity team is pretty active in IRC #fedora-diversity on freenode - so just send a message and we can help you get started. If you use telegram, we have a telegram bridge to IRC too.