thx AC420 () I regret to inform you that scrogging wouldn't be the way to go in your case.
You're growing from seeds. For a decent scrog/sog, clones (branches from motherplants that you put into the soil, and root) are actually a bit necessary, or at least seeds from the exact same strain. Because each strain grows at its own pace, and have their specific hallmarks. You need steady, simultaneous growth on each plant, certainly for a scrog. Otherwise one of the plants will be overpowered by the other, and steal its light.
Now I've seen LST on seedlings, but this takes a long time. So I suggest you wait for a bit . But, you can always bend regular plants, man, Powder Puff bent his main stem on one of his plants. Here's a pic.
Increasing yield can be done in many ways. Look it up I'm a bit tired