If OP is really in Denmark, I would check for locally sourced Kelp meal and Crab Shell meal.
If you can find both, you basically have all you need to get an organic soil going. Peat moss, Perlite and Earthworm Castings can be ordered online if necessary from lots of sources (although a good local worm guy is worth a lot but you can also just start your own worm bin and make your own castings, saves money, little extra work).
The Crab Shell meal could also be replaced by various other amendments.
There are several threads like the organics for beginners sticky in this sub-section of the forum.
The layering you propose in the pics you posted are also not really what "it is about". I don't think that will do much if anything.
When you have an organic soil mix, you don't need to layer anything or consider how much perlite is where in the pot etc.
You just fill the pot with your organic soil mix and plant your seedling in it and you are done. Just watering from now on.
Then you transplant to a bigger pot, when they rooted through your veg pot. The exact size of your vegetative pots and later flower pots, how many times you transplant etc. etc. is all up for debate.
To keep it simple, let's say you veg (vegetate) your plants in 1 gal pots and then plant them to 3 gal pots once rooted through the pot.
I would give them another week or so of veg once in the new pots to get acclimated and then flip the lightcycle to flower.
"Normally" you don't need anything but water in organic soil during flower either. But I have personally made the experience that some top dressing (adding more of the nutrient rich soil mix on top of the pots) during mid flower helps avoid the soil being depleted from this or that nutrient and the plant showing it during late flower. Another alternative would be a compost tea to give a mid-flower nutrient boost.
But this is all optional. You can definitely grow sublime organic herb by just adding water, provided your organic soil mix is "complete".
It is really one of the simplest forms of growing that produces (imho) the best quality bud out there.
The big hurdle is that you need to do the big work in advance. And also have the cost in advance.
But if you source the necessary ingredients to make an organic soil mix and are willing to pay for them, you already did the biggest part of the work.
Mix up the soil, have to let it "cook" (compost is a better word I think) for at least 2 weeks (I have planted after just 1 week before with no ill effects but definitely notice a better performance with my current soil that I let compost for a month before planting in it).
From here on out, you only need to put the soil in the pots, plant your seeds or plants in it and add water. Done
Now since OP has already started, I believe it will be a tall order to source all the necessary ingredients for the soil mix, get them, mix it, let it compost etc.
By then the plants will be growing too large (could be handled by topping and training the plants but then we get a bit more advanced).
So in this situation, I would say get a ready soil mix (Promix or whatever you can get) and use that for this flower run.
This is assuming that bottled nutrients labeled "organic" are already in the posession of OP. Then you can provide the nutrients for flower through the bottled nutrients for this run.
The following run, if organic growing is desired by OP, I would then source the ingredients for the soil mix well in advance, mix up the soil well in advance, letting it compost for a month if possible, and then grow organic from there on out.
The last thing to consider then for organic growing is that after you finish a run in your organic soil, you need to replenish the nutrients that were used up during the flowering of the plants.
You can simply top-dress (adding on top) all the nutrients you originally used for your soil mix (so in my example kelp meal, crab shell meal and earth worm castings). And then you are done.
Alternatively you can also shoot for "no-till" or "living soil" where you should probably still top-dress the used up nutrients but you don't necessary have to (or not as much). You can simply chop up the plants you harvested and throw that on top of your soil. The worms take care of the rest.
There is however much discussion about the container size for this. I have tried to achieve this in 5 gal containers and it doesn't seem to work all too well.
Most growers seem to be of the opinion that one should work with a large bed of soil, 10 gal or upward, instead of individual, smaller pots, for this to really "work".
I currently tend to agree with this but have not made up my mind completely, yet.
Hope this helps, good luck and get well OP