Let us know what you have done so far. What have you ran in the terminal? Some screenshots would help.
Read the readme file in the link above for instructions on what you should be doing to run the code.
I’ve read the Readme.md it’s asking me to enter jasmine helloworld.spec.js in the terminal i’m unsure how to open the terminal is there something I’ve forgot to download?
Are you working purely in your browser? There are several tools we invite learners to install early on, like an operating system, a local text editor, and more.
This lesson introduces the concepts: https://www.theodinproject.com/courses/web-development-101/lessons/installation-overview
And the following lesson has specific instructions on how to install everything.