A skirt is one of the easiest things to sew & you can make them for much less than they cost ready made. I love a basic skirt pattern that shows lots of variations right on the pattern envelope. Multiply those looks by all sorts of colors, fabrics, colors, solid/patterned & you have a huge number of skirts you can make from the same pattern. And they will all look different. Good deal.
Be sure to look for a pattern that is fairly easy & one that doesn’t use too many yards of fabric (to keep your costs down). I love a pencil skirt & it works well with variations. If you are not sure if a particular pattern is right for your sewing skills, ask the sales person for their opinion. They often know their stuff, especially if they are in a fabric store. Once you get used to a particular pattern you will be able to use it again a lot quicker. Practice makes perfect & all that. You can make yourself a basic black skirt or one in any number of fashion colors. Have fun!
Click title for link at Anthropology (no affiliation) to see some skirts they have for sale now to get ideas.