For over a decade, I've recommended using the products from AB Fertilizers. As long as you pH is correct, you cannot screw this up nor can you ever have a problem that is nutrient based in hydro. In soil it is the same, except for watching salting up with moms after 6-months or so....
Consistency is king with AB, and you can avoid all that "knowledge", LOL.... Just kidding. You still have to know what you are doing and your plants... just nothing about nutrients... it is done for you. I'm currently looking into finding an all organic certified nutrient that is as good and can be brought to market for a lower price than what is out there or is better than what is out there. So far, nothing has done the job as well as AB.
Good luck in your endeavor.....