Your Getting there good job.
Don’t worry about counting the amount you give (at least to us) or the amount of run off.
It will be much easier to read if you do the soil and coco in different paragraphs in the future.
Your plants are still small so we don’t want to flood them but if those were big plants and you seen 6.4ph coming out of a coco then keep giving it fluid until. That drops to an acceptable level (6.2max)
Snap a pic next update.