I am a 14 year old programmer. I'm stuck.

Hi, As the title implies I am 14 years old and an intermediate programmer. I would consider myself "fluent" in python with also experience in objC JavaScript HTML and a handful of other technologies. The problem is that my school does not offer any computer science courses other than Computer Applications 1 (learning how to use word, PowerPoint etc). Anyway, I feel as if I am stuck. Lots of people recommend creating some shareware or something like that. The problem is that while I know all the ins and outs of python(ish) this task seems daunting. The jump from intermediate to advanced, if you will, is huge. I would love to publish a desktop application that syncs with multiple cloud services but again, but the API's are daunting. Could anyone offer any advice or help, thank you!