WOW, i think you need to read some.
Nutrients all depends on how you grow. Soil, Hydro, Soilless, hempy, ect.
Do want to be organic, chem.
I am an organic grower, but keep supply of Fox Farms nutrients around. but also use other things. They have always worked great for me.
If first grow would get a bag of fox farms ocean forest and the fox farms trio pack...just to keep it simple.
I don't fert until the 2nd week then i start out 1/4 strngth.