Occasionally I get invited to people's homes for a meal, so I bring a bottle of wine. I do find it stressful to chose the wine, because I have no idea, what is considered a good wine. In an attempt to educate myself, I ordered from Amazon the book "I don't much about wine, but I know what I like" by Simon Woods. The book gives a number of hints about wine. I don't want to become a wine snob. I now know that screw tops are not as bad as I thought, before reading the book.
Now I am tempted to get a case or two of wine from Amazon.