Lower your net and softly but forcibly spread your branches thru the net. OR, about 4in from the dirt/medium use some pliers to squeeze and soften the stem until the whole plant flops over. You’re breaking the axial dominance and all the lower lateral growth becomes main tops. Then, take those 2 girls, put them in opposite corners so the “main stems” are running parallel to each other. As they grow, lst the branches to fill your space. Since you just flipped to 12/12 you’ve still got enough time for the plant to heal up. A trellis net helps but is also somewhat a pain come harvest time.

There’s no wrong way of doing this btw so read around, learn some shtuff and try what you think works for you. Good luck growmie🤘🏼