I wouldn't worry too much about the pip and virtualenv tools. I would focus on learning the language, and building something that is interesting to you.

You will learn how to use pip, when you need to install a new Python library.

You will learn how to use virtualenv, when you share have 2 programs that use different sets of libraries, or you want to share(set up a dev environment) a program with somebody else, and you need to communicate the different requirements(libraries) for using that program.