first thing i would do is drop the idea of adding coco.
your forest floor has more to offer,look for a dead tree that when you step on it,your foot falls into it,take that black gold called humus,then search around for the shrooms dont use the honey shrooms,but collect that soil from around it also,next off collect plenty of that leaf litter from the top then about first 2 inches of the top soil.
take all that back to the cabin and mix and dump in a pile under a shaded tree,give just a tad of water dont drench just moisten it ,then find a old ass piece if carpet and throw on top that pile and walk away,come back in 6 months ,lift that carpet and you will see not only living soil but moving soil.
with this recipe all those amends arent needed it will come fresh from
mama nature,feed the soil teas if you have too,you most likely will never water
or feed it if you did it right,only reason you should is if your in drought conditions.
not for everyone ,but the idea is there
i filled this ring 2 times with dead leaves and alfalfa hay,yard waste and table scraps,watered the leaves to heat up and cook,other than that and in a year and half,it has had no water,after the first fill of ring had broke down i planted this peach tree right in the middle of it,look at size of stalk,this tree is sitting right in top of a slate of rock at 8ft round,living in just that compost