how do i start hydro

[Nikon]

i got all the stuff i was just need to know do you grow in all hydro clay or do you put somthing under the hydor clay to plant the seed in? if so how much of the other stuff do i put in then how much hydro clay do i put in. and what are the cheapes but best nutes or fertz to use and how do i use them like how do i appaly them.