Django folder permissions for installation - django

Question

The official Django installation documentation seems to be lacking in exactly how to set up folder permissions post-installation so that a 403 Foridden error does not show up on a live apache installation.
I've spent 2 months going through thousands of forum posts, hundreds of guides, and countless Stackoverflow Q&As about setting up folder permissions. No single two of these posts, guides or Q&As are the same. All are riddled with users having to implement custom solutions here and there to get things working, there's no consistency anywhere as to exactly what folder permissions should be set up. I probably speak for silent untold thousands who gave up when trying to do folder permissions.
So my question is simple, how do I set the correct file and folder permissions on Ubuntu 16.04, configured with Python 2.11 in a virtual environment, with Django on an Apache mod_wsgi server?
My structure is as per the official documentation - /home/main/myproject/project
All of these folders (home, main, myproject and project) have 755 permissions owned by a non-root sudo user called 'main' which I use for everything.
I've done:
chmod 664 ~/myproject/db.sqlite3
chmod 775 ~/myproject
sudo chown :www-data ~/myproject/db.sqlite3
sudo chown :www-data ~/myproject
Apparently these are all the permissions I need. Yet I still get a 403 forbidden error. How on earth do I please get this Django thing live?
Edit: I've followed this tutorial exactly: https://www.digitalocean.com/community/tutorials/how-to-serve-django-applications-with-apache-and-mod_wsgi-on-debian-8 particularly the part with appending /etc/apache2/sites-available/000-default.conf
My 000-default.conf append looks like:
<VirtualHost *:80>
. . .
Alias /static /home/main/myproject/static
<Directory /home/main/myproject/static>
Require all granted
</Directory>
# Next, add the following directory block
<Directory /home/main/myproject/project>
<Files wsgi.py>
Require all granted
</Files>
</Directory>
WSGIDaemonProcess project python-home=/home/main/myproject/projectenv python-path=/home/main/myproject
WSGIProcessGroup project
WSGIScriptAlias / /home/main/myproject/project/wsgi.py
My Apache error logs don't seem to show any issues after visiting the forbidden domain index:
[Wed Jun 27 07:03:46.807525 2018] [mpm_prefork:notice] [pid 21287] AH00171:
Graceful restart requested, doing restart
[Wed Jun 27 07:03:46.878042 2018] [wsgi:warn] [pid 21287] mod_wsgi: Compiled for Python/2.7.11.
[Wed Jun 27 07:03:46.878052 2018] [wsgi:warn] [pid 21287] mod_wsgi: Runtime using Python/2.7.12.
[Wed Jun 27 07:03:46.878142 2018] [mpm_prefork:notice] [pid 21287] AH00163: Apache/2.4.18 (Ubuntu) mod_fcgid/2.3.9 OpenSSL/1.0.2g mod_wsgi/4.3.0 Python/2.7.12 configured -- resuming normal operations
[Wed Jun 27 07:03:46.878156 2018] [core:notice] [pid 21287] AH00094: Command line: '/usr/sbin/apache2'
[Wed Jun 27 07:03:50.444008 2018] [mpm_prefork:notice] [pid 21287] AH00171: Graceful restart requested, doing restart
[Wed Jun 27 07:03:50.517693 2018] [wsgi:warn] [pid 21287] mod_wsgi: Compiled for Python/2.7.11.
[Wed Jun 27 07:03:50.517704 2018] [wsgi:warn] [pid 21287] mod_wsgi: Runtime using Python/2.7.12.
[Wed Jun 27 07:03:50.517823 2018] [mpm_prefork:notice] [pid 21287] AH00163: Apache/2.4.18 (Ubuntu) mod_fcgid/2.3.9 OpenSSL/1.0.2g mod_wsgi/4.3.0 Python/2.7.12 configured -- resuming normal operations
[Wed Jun 27 07:03:50.517837 2018] [core:notice] [pid 21287] AH00094: Command line: '/usr/sbin/apache2'