Being a Debian maintainer, that is a very bad and low quality tutorial. You missed a lot of files in debian directory, even your example of control file is not good enough, you're using practices to build package which would reject your package from even entering Debian. Also lintian is a must be if you work with Debian (and it would really scream with your tutorial).

Better tutorials:

https://wiki.debian.org/PackagingWithGit (because we are all going to git the world).