Looks great so far. you want 1 gallon of space per foot of growth. def. get some nutes man. make sure you get hydroponic nutes that have everything the plant could need, i feel safer that way, dont overdo it and remeber to use the nutes at lesser strengths than on the bottle and slowly move up. alot of people measure this by ppm also, i just started the nuts myself and im seeing good results. i just put my hps up that i got today, 400w, wow is it bright.
You started off better than i did so you should have good luck, if you read my journal you will see i've been goin thru some shit with my ladies but i think i'm learning fast. Just have faith and read alot. dont read just 1 guide, as you said and know there are different ways to do things. develop your own way and if it works for you stick with it.
Good luck!