Hi you have to create the enviroment and then activate it, after that you can install everything because is like a buble in your computer and in that bubble is all the configurations for your project, and are just in that enviroment without affecting the configurations in the rest of the projects in your computer. So please research about virtual enviroments and enviroments managment using Python to avoid problems in the future. You have to do it in your command line doesn't matter where you put it you have to make sure is activated the enviroment and just run (pip install pandas ) or any other librarie you need