focus on the condition of ur enviroment, make sure ur room's temp stays in the 70's, keep ur humidity around 35% to 40%, set up a inline fan in ur romm for extractin air out, make sure ur room is light tight and clean ur room before puttin any plants in there, these are sum things that are crucial to a good grow, if u have ur enviroment tooken care off u dont need any expensive nutes to pull off a good crop, depending on how u wanna grow organic or synthetic, therre are a wide range of liquid and solid nutes available, i grow organic indoors and outdoors, the only liquid nutrients i use is fox farm big bloom and wholesome sweetener's organic un-sulphured molasses, my nurtients are all in my soil mix, all i have to do is add filtered water and sum molasses and big bloom during flower and i get great harvests (i use compost teas too but thas something to learn about if u decide to grow organic) for outdoors i dont even use liquid nutes besides molasses my outdoor plants go into a compost heavy soil mix that works wonders for me