For the record, I have gone with SCROG when using clones but not seeds. That said and assuming similar expected results, here are some thoughts.

Place the screen 8-12 inches above the pots. I topped mine just before placing the screen in the room to get them bushy.

Choose a screen with 1 in x 2 in or 2 in x 2 in openings. I used a wire screen but next time I'll try the plastic animal fencing stuff. Some people actually tie a screen out of string or masonry twine. Just make sure the openings are not too small.

Weave them through the screen during veg and the first 2 weeks or so of flower, but after that stop messing with them. (I tied them back into the 4 week range and they got leafy on me). In other words don't be afraid to let them stretch after 2-3 weeks of 12/12.

That's about the basics as I know it. Maybe Opie has additional keys for ya. Let em know what else is on your mind...