advice needed !

I recently saw this beautiful girl modeling at an event. When I followed the event's page on Insta, to my surprise, a day or so later, she and the event page followed me back... before anyone asks I know it's her and not some Catfish I've done my research. Recently she liked a bunch of my pictures and I'd love to start up a convo with her but I have no idea what I should say... or if I should say something at all. please help!