If ur seed don't work have a look at sensi seeds skunk#1 it's cheap, very stable, and super easy to grow. Let's hope these seeds work.
Even though I'm a hydro guy I would seriously reccomend soil, dwc is too risky/problematic for a beginner, you're relying on these meds. For dwc ur gonna have to buy a ph and ppm meter which is not cheap.
It's going to take you approximately 3 months to from germination to harvest, don't risk a failure. Make this as easy as possible for urself you NEED these meds more than most of us.