In this application you gonna find wagtail examples. In this situation db is sqlite3 but easily can change from mysite.settings.base.py As you know in django applications database can change easily from config file.
Create virtual environment and activate it
virtualenv venv/
source venv/bin/activate
Install requirements
pip install -r requirements.txt
make sure when you change your models you migrate your database.
python manage.py makemigrations
python manage.py migrate