With all due respect, this tutorial might be a little over your head, but a little bit of research will get you up to speed. __init__ files and virtual environm

With all due respect, this tutorial might be a little over your head, but a little bit of research will get you up to speed. __init__ files and virtual environments are not specific to Django or DRF. These are typical patterns used in python development. For example, using a virtual environment allows you to have a self-contained python environment (your choice of version) with package management through pip. This is enormously useful when writing apps--you've got python and dependencies all in one spot contained in its own environment.