A long long time ago I made my own wine the old fashioned way, right down to squeezing the grapes in a wine press. I would keep constant watch on the casks, periodically adding sugar to raise the alcohol level to where I liked it.

I learned the process from my best friend's father who was an Italian immigrant and carried the recipe with him from the old country. It was a great hobby and very rewarding when the final product was ready for sampling. However, it was very time consuming. Eventually I stopped doing it as life started getting in the way.
I would recommend the hobby to anyone if they have the time and patience.
P.S.
There are a number of people here at WinCustomize who should be very adept at making wine. They do it almost daily......, oh no, sorry, that's spelled w-
h-i-n-e.