Copy .bem, GNUmakefile, package.json to your Django project root.
Run npm install to install all dependencies specified in package.json.
Just run make and it will build only what's needed.
Django apps are blocks on the project root level. So you can run bem create block <appname> to create new app with all BEM related features inside.
Models are blocks on <appname>/models level. So you can run bem create block -l <appname>/models <modelname> to create new model.
Views are blocks on <appname>/pages level. So you can run bem create block -l <appname>/pages <modelname> to create new view.
All templates that are used to create new files are defined in .bem/techs/*.js files. Feel free to modify them.