Creating a theme is simple and doesn't require any programming knowledge at all.
However you'll need to install Android Studio to build your theme.
2. Extract and open theme with Android Studio.
3. Change AndroidManifest.xml with your unique package name and app name.
4. Change values.xml or put png files in drawable folder.
5. Build and deploy the theme.
If you have any question - Contact firstname.lastname@example.org and we'll help you build your theme.