It doesn’t have to be that hard. Some people make it rather tedious. And I suppose there are some wines that are not so easy to make. Mine is quite simple.
I start with grape juice. Just plain grape juice. It can be had in the typical 3 quart jugs that “Juicy Juice” and similar juice typically come in at the grocery store. I don’t want a lot of ingredients, just plain grape juice. I prefer red / purple rather than white but that’s just my taste. I’ve done both, and a few different kinds of juice besides.
Assuming I’ve bought one of these bottles from the store, I’ll pour a little out to make some room in the top of the bottle, maybe 2 cups or so. It’s not critical. Then I’ll add two things; 1) sugar, and 2) regular old bread yeast. The formula is: 1 quart of juice, 1 cup of sugar, 1/4 teaspoon of yeast. Adjust to how much you’re making.
I’ll shake the bottle up or stir if I’m using a glass jar until it’s all dissolved and the sugar isn’t sitting on the bottom and the yeast isn’t floating in lumps on the top. Then I put the cap back on the bottle or a lid on the jar that is loosened just enough to allow pressure to be released as it builds, and it will. But it does need a lid to keep bugs / insects and maybe dirt out of it. You can buy air locks and fancy lids, not necessary. That’s it.
I’ll then put the bottle in a warm, dark place. At my house, that’s in the closet with the water heater. I’ll check on it every day or two just to make sure the lid isn’t too tight. I’ll see bubbles in it for a few weeks. And when it’s done bubbling, maybe 2 to 3 weeks, I’ll have a little taste test. That’s usually about all it takes in my particular water heater closet. If the temperature is cooler, it’ll take longer. If it’s warmer, it doesn’t take as long.
Now you know my secret. Not much of a secret, really.
I did read about numerous kinds of fancy pants wine yeasts and picked out a highly rated one and got some. I then made about 4 or 5 different kinds, each having one bottle with the fancy pants yeast and one bottle with the bread yeast. Honestly, with the red / purple grape juice, I liked the bread yeast better. A few of the others were debatable. But, I also found out that the red / purple grape wine was actually the one I liked the best anyway.
I will admit, the one I just put in the water heater closet, I had a frozen grape juice concentrate in the freezer I wanted to try. Thawed it and added water. Put in about 1.5x the amount of sugar because I like a sweet wine. Stirred that and the yeast into a 1/2 gallon canning jar and put a lid on it (loosely). So we’ll see. The formula is pretty forgiving. You like it sweeter, add more sugar. You like it less sweet, add less sugar. I think it does need a little to give the yeast somethin’ to eat.
Probably more than you wanted to know. LOL!!