It all begins from the "Getting Started" type of guides for both the MicroPython SDKs and the C/C++ with the code examples, shown on Github, up to the serious datasheets for the said Pico as well ...

Then, you can intersperse your Python code with MicroPython-written functions, and call them whenever you need your connected device to do something – keeping the entire logic of your project ...

The differences between the Python and MicroPython programming languages are minute, but they make a powerful difference.