Masonite strives to have extremely comprehensive documentation. All documentation can be Found Here and would be wise to go through the tutorials there. If you find any discrepencies or anything that doesn't make sense, be sure to comment directly on the documentation to start a discussion!
Also be sure to join the Slack channel!
To setup the package to get your package up and running, you should first take a look at setup.py and make any packages specific changes there. These include the classifiers and package name.
Then you should create a virtual environment and activate it
$ python3 -m venv venv
$ source venv/bin/activate
Then install from the requirements file
$ pip install -r requirements.txt
This will install Masonite and a few development related packages like pytest.
Finally you can run the tests and start building your application.
$ python -m pytest