Looks like you need to axe some of those giant sucker leaves. Once that branch sprouts from the main stem and has a couple nodes. KILL THE FAN LEAF.
Most of us are growing inside with limited space. Shielding the undergrowth with fan leaves as big as your face never works.
Forget the BS about fan's being solar panels or whatever that bullshit is. The fan grows a shoot from the axis between itself and the main stalk. Once that shoot has established itself, KILL THE FAN.
Look up my previous posts/grows if you don't believe me.
I grew bagseed sativa straight up under T-12's for 5 years before I properly learned how to LST, supercrop, and PRUNE.
Don't be afraid, Slice and dice that fucker.