I managed to install Wolfram Engine and Jupyter and I can write Mathematica code, also I can get nice results and I can draw elegant plots. But even I tried so many functions and their combinations of parameters I could not manage to import any .nb file from local disk or a remote source:

I expected this to work:

File1 = NotebookOpen[ "C:\any_nb_file.nb"]; 
SelectionMove[File1, All, Notebook] 
SelectionEvaluate[File1]

I also tried

NotebookOpen[ URL["any_nb_file.nb"]]

Also I think it is legal to use Wolfram engine and Jupyter because of this post:

https://community.wolfram.com/groups/-/m/t/1887758?p_p_auth=UlJXJ3My

if not please let me know.

Thanks for reading.