What do do next must be informed by how you plan to grow out your girls- assuming, of course, that they do turn out to be girls.
Are you gonna grow with overhead light? Or, grow with bare bulbs hanging down? The plant's structure will need to be trained differently for each approach.
Are you going to grow in coco, organic soil, soilless mix, or deep water culture? How big do you want the girls to get?
Growing is a lot like chess; you must begin with your desired endgame in mind- otherwise, you're just flopping around without direction, and that's a sure strategy for losing.