i would start them in a pellet or rooter first, keeping the moisture correct for the seedlings will be hard in coco

use CALMAG everytime you water, when your not nuting.

i would soak the coco with really light veg nutes and maybe something like liquid karma or B1 right before you transplant into it. let em be for a couple of days then start giving nutes at 1/8 strength or even less. slowly work your way up