is pro mix an organic or just soiless medium like a perlite or rockwool?

question 1
Organic soiless would be a forrest compost so what would pro mix be considered?

Question 2

How would I fert pro mix for veg and flower? hydro ferts? organic? chemical?
i was thinking a hydro fert because if it is soiless like a rockwool I would need micro nutes

Question 3

For a organic forrest mix what organic fert would i use for veg and what for flowering?

I was thinking an organic fox farm liquid fert because organic would make the micros after the NPK is added

Im new at this