Well, if you live in Washington State, we have some of the best grapes in the world and there are ways to get them from even the best vineyards. I belong to the Boeing Employees Wine Club and we have connections to several of the best but you need to be a current or former Boeing employee. A couple of the brew shops around also will organize grape buys. I think Beer Essentials in Lakewood, WA and The Cellar Homebrew in North Seattle organize group buys. Or you can get on the phone and talk to some of the smaller vineyards directly. The only problem is that it is kind of late. Most grapes were spoken for last spring.
The other issue is equipment. Most people start with wine kits which are a little easier because you don't have to worry about crushing or pressing equipment. You can buy everything at your local brew store (my favorite is Larry's in Kent) but it can be expensive to buy all at once. If I were you, I would pick up a wine kit from Larry and buy the minimum equipment to get your first batch made. This winter make the wine from the kit and try making some pear, or strawberry wine just to get used to how fermentation works. Then next Spring look into pre-ordering some real grapes from the Columbia Valley.
I have 400 lbs of Cab coming from Horse Heaven Hills and 200 lbs of Cab Franc from Rattlesnake Hills that will hopefully be perfectly ripe this week. I can't wait!!