You’re fine for space in my opinion mate, id give it a bit more veg time and do some low stress training then flip once you fill some of that remaining space. They will grow upwards (tie em down if one gets too high above the others) but you got the height to handle it. A general rule of thumb is double or tripple the height once you flip unless you have sativas.
If you look at larrys first pic his is bordering on 80% filled (scrog net helps loads if you can still water) id aim for around there.
You can always remove a plant if it gets too crowded. How i tell if mine is too crowded is i look at the leafs touching one another and if moisture remains then its too dense.