its not cool to grow in your family's house. especially if your not the owner of the home. thats my 2 cents on that. like has been said growing takes lots of time, patience, work, and more time lol. even once your seed sprouts and gets its 2 embryotic leaves you still have at least 3 months before you can get anything to smoke(lowryder is th exception. your on the right track just keep reading and asking questions. growing cannabis is an arjuous task and takes lots of tlc.
on another note. i let my seeds pop their taproot till about 2-3 inches before i put them in my rockwool(soil in your case). even if you let the taproot get that long it could take up to a week(not normally but it does happen) before you even see any life pop above the soil. just keep reading man. your on the right track just keep on learning. i studied to 5 years before i could actually grow (was living with family and felt it was immoral to grow under my mom's roof, its her ass/house/etc if i get caught. needless to say i have my own place now and made it happen. but im not here to preach morals, just to help you accomplish the task at hand.