What sort of help.........the chart pretty well spells out what and how much to use?
I would ignore the recommendation to buy and use any sort of foliar spray, they just want you to buy stuff and foliar sprays are really quite useless in the big picture.
Concentrating on getting the pH and EC levels correct will boost your plant far more than any sort of "snake oil" foliar sprays.
Feed charts for cannabis are usually designed for photoperiod plants. Autos in my experience require slightly less feeding, half to three quarters strength is usually enough for autos.
Remember too, it is very, very easy to correct a slight under feeding, but very, very hard to rescue a burned and damagd over fed plant.
The tips they give about run off should be strictly adhered to.