VS Code Jupyter notebook error when running "Mandelbrot.ipynb"

[koegli]

I installed MAX and the python venv as shown in the docs and video. Everything works fine.
When opening the the Mandelbrot.ipynb I only get the possibility to select the preinstalled max venv (not the one I installed according to docs). When choosing it and running the cells I get the following error:
...
missing numpy
numpy not found, installing...
error: externally-managed-environment

× This environment is externally managed
...

I then managed to install a new ipykernel from within my own newly created virtual environment and can select it on VS code, but then I get syntax errors from pylance stating that e.g. "alias" or "fn" are not defined as syntax. I guess it is expecting python syntax.

Now my question is: how can I select the Jupyter kernel to use the created and activate vent from me as suggested by the docs and have the notbook code run correctly?