Keep in mind that grapes are a perennial crop, and require annual, monthly, and daily training depending on the time of year. If you're interests lean towards traditional European varieties, know that they are susceptible to many diseases that are indigenous to this continent (powdery mildew, black rot, downy mildew, Pierce's disease, etc.) The only way to combat these diseases effectively and consistently is through fungicides, etc.
Most vines are planted by early May, and yes, you'd be best getting cuttings or grafted vines. The vines will usually produce a healthy crop two to three years after planting. A trellis (for training the vines) can be installed in the second year. (See a related post on this site for design of the trellis.)
There are some good resources out there for starting out, just keep in mind that most sites can grow grapes in this country, the real question is whether or not the quality of the resulting fruit will be worth the effort.
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