I used to make some of my own clothes when I was a teenager, nothing too fiddly but plain tops, skirts, trousers.
Making your own curtains is ace, they are dead easy and as others have said, such a money saver, especially if you have large or unusual sized windows.
My mum's mum was a seamstress by trade and had one of those big professional old Singers - you know the ones with the big treadle and the fold out wooden work bench, lovely piece of equipment, so I used to use that.
It would be worth a fortune these days (especially as it was well-maintained and perfect working order!), but after I moved out it wasn't being used and I think my parents got rid of it at a car boot sale, there wasn't much interest in them at that time as beautiful objects, especially since it was a large piece of home-industry furniture made from what was at that time quite unfashionable dark wood and iron, and took up quite a bit of space. I still wish I'd had room to take it at the time mind, feel very regretful about having to turn it down.