Cannabis has two stages of growth, veggin, or vegetative, this is when it is simply growing, this occurs under a light cycle of more hours of light than dark, say 18 hours on, 6 hours off, and then flowering is once the light cycle drops to 12 hours on and 12 hours off. Vegging and flowering.
I will admit i know very little at present about suitable ratios so will leave it so someone more knowledgeable to answer that. The best piece of advice i can give you though, is buy a digital ph meter, those 3-in-1 2 prong analogue things are an absolute piece of crap, they are not to be trusted! Also bear in mind that once you start adding nutes to water, the PH is going to drop, if it's already at 6.5 then adding nutes could potentially drop the PH to a level not suitable for soil plants so just keep an eye on that one