It looks like the screen may be a lil high for a SCROG. Hard to tell from the pic. You want that screen low as you can to the pot, but it is still high enough for you to get under it to feed. That, to me, is about 8-10” off the top of the pot.
You have 2 plants in that screen. You’ll have branches going everywhere, so it’s gonna be hard to tell strains a part once they fill in. I like to tag branches with 2 different color zip ties to distinguish the different strains when I chop.
Yup, fill it almost completely in and the sides will come in with the stretch. Maybe check out some SCROG topics. This is a good one.