So I am about to start on my 5th batch of wine. In the past I have just used bare bones basic equipment. So no hydrometer. Well I finally got one and I'm a little confused. I understand how it works but I'm not sure how I decide what the starting gravity should be. The next batch I do will be a red grape that is growing in my back yard. I am shooting for a wine in the 11-12% range. Any help is appreciated.