Get some clones from a garden center, i started my grapes about a month ago from clones, they are about a foot now :]
just make sure you pH the soil to 5.5 or 6.0 and provide plenty of magnesium and molybdenum as they need lots of it. Fertilize as you would cannabis when fruiting but water more frequently in small amounts instead of drenching as their fruit is mostly water. If your soil has nutrients you shouldn't need to fertilize in veg. If you live in dry climate(20% or less) water in the morning every day so it can provide humidity throughout the day.
Good luck & Happy gardening!