Update README with poetry setup and contributing guidelines

README.md

@@ -53,29 +53,26 @@ below.
 
 ## 🧑🏿‍💻 Developing
 
-### Using poetry
+### Using Poetry
 
 The development environment can be set up using
-[poetry](https://python-poetry.org/docs/#installation). Hence, make sure it is
-installed and then run:
+[Poetry](https://python-poetry.org/docs/#installation). Ensure Poetry is installed and then run:
 
 ```bash
-python3 -m poetry install
+poetry install
 source $(poetry env info --path)/bin/activate
 ```
 
-In order to install dependencies for testing (codestyle, unit tests, integration tests),
-run:
+To install dependencies for testing (codestyle, unit tests, integration tests), run:
 
 ```bash
-python3 -m poetry install --with test
+poetry install --with test
 ```
 
-API documentation is built using [Sphinx](https://www.sphinx-doc.org/en/master/) and
-can be locally built by:
+API documentation is built using [Sphinx](https://www.sphinx-doc.org/en/master/) and can be locally built by:
 
 ```bash
-python3 -m poetry install --with docs
+poetry install --with docs
 cd docs
 make html SPHINXOPTS="-D nbsphinx_allow_errors=True"
 ```