Ellen Lewis wrote:I know you say you want a skirt, but you also say "they" would prefer a dress.
So, pardon me, but I'm encouraging you to think about a dress instead.
I agree with Ellen that you should consider a dress. A skirt and blouse combo can look a bit frumpy or dated when you don't choose an excellent style.
A dress is more forgiving. I don't need fancy or festive dressing in normal live but two years ago needed something for my eldest daughter's graduation ball. As I am not only frugal but also very small it is hard to find a ready-to-wear dress so I sewed one myself. The bodice is doubled and I copied it roughly from a top I had, then I just added a large, almost circular navy sheer fabric which I don't remember the English or German name for (chiffon?), and added a lining in a matching colour.
The waistline is very high so it would be good for changing weight, almost an empire style waist.
As the skirt is very long you don't have to bother about tights etc.
If you managed to sew the bodice (mine gaped a bit so I added a brooch), you will only need some help with marking the length of the skirt and then need some patience with hemming.
According to location/weather you can add a bolero type jacket (sewn, knitted, or sourced second hand) or simply complete with a nice shawl (one size, can be borrowed).
Anyway, I was complimented on the dress and will probably reuse for next daughter's ball.