How do I get myself to wear a skirt?

You have to wear them to school, that's the dress code, so you really have no choice but to wear them and that's all there is to it. You'll get used to wearing them soon enough, even though you don't realize it right now. Personally, if you were my daughter and I had to listen to your complaining about something so minor, I'd toss out all your pants and require you to wear skirts and dresses all the time. It's high time you learned to dress like a lady and hopefully doing so will teach you to act like one as well!