first off ya need an electric supply to the shed
and then ya will have to make sure it is light proof (no light leeking in)
i would get some sort of soil setup maybe a heater with it being in shed
and an envirolte blue spectrum for vegging or an mh light setup
and then a red spectrum envirolite for flowering or an hps light setup
i would also cover the inside walls of the shed in mylar for added reflectivity
i would germinate the seeds indoors untill sprouted and potted then move them in the shed under the vegging light on a cycle of 18 hours of light and 6 hours of dark
you could also do with a fan in there blowing on the plant that will stregthen the stem
only feed them water for the first 3 weeks and then think about getting some kind of nutrients canna terra for vegging is good
cheers dude hope this helps