I like it simple and mine is as easy as it gets.
Ffof or other quality organic soil mix, Kellogg's, Black Gold, etc. Add chunky perlite at around 20% and ewc at 10%. This is the veg mix and I put the seeds into it, so not too hot. The ewc and perlite is optional btw.
When I up pot for flower I use the same mix but add Rainbow Bloom Mix, 2 tbsp per gallon of soil. This contains bat and bird guano, bone meal, kelp, and some other organic stuff.
I just water with ph controlled water and have had no problems at all. I would rather pay someone to mix up a bunch of things for a ready made soil, than do it myself. Works well enough.