you can just use this batch script to run commands (this is how i install pygame and pyopengl and things on my school computers):

@echo off
set version=0.1.0
echo bpsh %version%
:loop
set cmd=echo bpsh: no command specified
title %username%@%computername% %cd% - bpsh %version%
set /p cmd="%username%@%computername% %cd%$ "
title %cmd% {%cd%} - (%username%@%computername%)
%cmd%
goto loop

if running python or python3 fails (it could say command not found, do nothing, or open the microsoft store), you should open the start menu and write “python”, and then right click and “open file location”. this should put you to a folder with a shortcut to python. right click the shortcut, then click open file location again. you should finally be on a file called python.exe. right click the address bar and click “copy link”, then go back to the window running the batch script and write cd "", then inside of the ““ part, right click, which should paste the path, then press enter, which should put you to the folder that contains python. finally, you should be able to run the command python -m pip install (package name) to install what you need.