Hi Lostwordsmith! Welcome to Prep. If you can write a short story, you have all the tools you need to write a novel. You'll be great. Don't hesitate to ask if you need any help. There are lots of us here who have transitioned from short stories to novels. Happy Prepping!
Schnujo's having school probs I don't know if it helps or not, but I heard on the Writing Excuses Podcast that novellas are kind of in right now. So, get that story out!! Don't quit.