Royal gold tupur, fox farms trio, distilled water

These were planted on wed and it's sat.
All they've had is pH 5.8 distilled water (ppm 0)
The nute chart says feed. My buddy says they'll burn if the roots don't establish first. I've heard it both ways about ppm 240-400 is safe if they have their first true leaves they're photosynthesizing and need npk that Coco coir doesn't have any of and that makes sense, but still others say the seed provides enough nutes for the first week. I just need some help here.
I prefer ppm to EC please. Any pointers on when and how strong to make the solution. I know I need to feed soon and Everytime I water. I'm using gh cal mag and fox farms big bloom grow big and tiger bloom I think they're called.
Big bloom is organic, that shouldn't burn them right? So that and cal mag until another node or what? And do you top godfather og at the fourth or fifth node?

What are they are planted in? Soil, coco, brand? It looks very wet. Make sure your planter cup isn’t sitting in water. Be sure to let the soil dry back a bit, the roots need to breathe. I’d be real careful with nutes at this stage, I’d give it a week or two, then very weakly!!

Edit: if that’s coco, then it needs to be kept wet, but still well drained, and since most coco is devoid of nutes , you may need to feed.

Not sure what that white fabric is, but it appears it's in a solo cup.
Does the solo cup have drainage?
Are the roots supposed to grow through the white fabric?
If so, I would raise it up and fill the cup with coco.
I start feeding around the 3rd day from sprout with a weak nute solution.
Why are you using distilled water?

Royal gold tupur is the medium it's a coco coir pre buffered mix that has perlite in it, the solo cups are bottomless and they are in one pint fabric seed starters

The tap water has a ppm of 320. That's why distilled water which has 0, so we can control and measure the nutes right...

Also, you can't see it but they are on plant risers holding them above the drainage trays

The roots will grow through that white fabric pots from what I've seen, if we don't move up to the one gallon fabric pots before that completely happens