I've been doing it for a few years now, I've only ever had one frankly appalling batch and that wasn't technically wine.

I was trying to make "turbo cider" and it's honestly the most disgusting thing I've ever made. The best was rose petal wine, it comes out as a really sweet dessert wine.
You can get kits, but it's easier to buy everything piecemeal when you need it, since you get through things at different rates. It's a bit of an outlay to start with - you need demijohns, rubber bungs, a large bucket, airlocks that tell you if your wine is fermenting and help keep bugs out, yeast and yeast nutrient (but you only use a teaspoon or two of each), and some people swear by grape concentrate but I've never used it. Everything else you just follow recipes for (or make up your own

). There are entire books of recipes for different 'country wines'.
It's good fun to try, especially when you make something by picking your own (like the elderflowers, and blackberries make a nice wine too) and... well, one gallon makes about six bottles and the cost per bottle is usually around 50p!
Not that that's what encouraged me to start doing it in the first place, nooo.