It doesnt matter which way the tail just not straight up and you will want to put them in about a quarter inch deep.
As far as nutrients go don't over complicate things, you can use a water soluble or liquid "general purpose" plant food for vegetative growth and a "flower" plant food for the budding phase. Miracle grow makes both which is a good start until you learn more about feeding. I'd give it a couple of weeks before you start feeding and keep it light. If you want to stay organic you can look into Blood Meal for vege and Bone Meal for flowering.