The tutorial from RQS is good with my exceptions on their recomended growing temperatures I believe they are too low. Germinate at 80°F, then 68°F night and 78°F day. has worked best for me. Yet in their defense it may still work just fine especially in a cold climate area where heating is expensive?
I find it difficult for most new growers and even myself to accurately time what and when to feed soils that are precharged but wear out. It is especially hard on autoflowers if you mistime it because they mature so fast. I am not saying that it cannot be done. We have growers here that do it very well indeed.
@autobeast has an excellent formula and you can read it here:
https://www.autoflower.org/threads/...a-perfect-healthy-auto-start-to-finish.67300/
Full on living organic soil is the easiest of all soils to grow in - all you add is water. It must be a large enough container =>5 gallons for one plant. I would use 7 gallons. You either need to make your own (best in my opinion) or you buy it at a premium. You people take gardening very seriously there so you should be able to source some good organic living soil. If you can fit a 15 gallon container you can do no till and the guy to talk to about that is
@Proph
Plant Magic - I am not familiar with this product. I looked it up and Fytocell Foam is new to me.
Fytocell is an organic synthetic hydrophilic
foam, which is biodegradable with an open cell structure. It provides optimum capillarity, homogenously throughout the whole substrate, providing an water/air ratio of 60/40, irrespective of height.
When I read that I think nutrient sponge and hydropinics but the base is peat so almost hydro! The secret sauce is most likely Kelp and humic acid. It is not precharged with elements so you can go organic or salts but no matter which way you go get the whole line You could even use the RQS line you already have. (time release

) It is obvious to me though I think you should use the Plant Magic Old Timer if you run their soil to go organic *. They could not survive in the UK if it did not work.
* not true organic in my definition.