Hi tabithatortie, welcome from me too. Slow sewing is 'the thing' of the moment so you're starting absolutely in the current groove.
I just sew slowly because I'm retired and no longer need to rush it, most of the time anyway.
You will need to let a circle skirt in woven fabric drop and level the hem again and yes, there's the slightly awkward hemming on curved edges but it's doable using the right techniques - a great topic for your next post I think!
Lots of tutorials online that we could recommend, in fact lots of people here to help you too. In any case, I'm sure she'll be so pleased with her swishy twirly skirt she won't be examining the hem.
There's also the exciting possibility of using non-woven fabrics that don't need hemming and won't drop either such as knits and tulle - lycra circle skirts are the swirliest of all!
Some people are nervous of these fabrics because they need different techniques to the ones they're already familiar with but I think when it's all new to you is the very best time to try it, especially if you have a zigzag machine. In fact, a circle skirt is an absolute doddle as you can just make a waistband from wide elastic and then stitch it straight onto the skirt that you've cut out in one piece. Lycra and tulle is the food and drink of the dance people, so if you want to give it a go come and have a chat!