I recently spoke at the Triange Linux Users Group meeting about making Debian packages. This is a topic that's near and dear to my heart since I think that apt is one of the more powerful pieces of software that is underutilized in today's world, where deploying code with no build process seems to be the norm.
The notes to my presentation can be found as a separate page here. After following along with the presentation, you should be able to create basic software packages for Debian/Ubuntu. Hopefully, that skill will come in handy one day.