1- To run LLAMA2, you will need Python installed on your system. PyCharm comes with its own Python interpreter, so you should be able to use it to run LLAMA2. However, if you prefer to use a different Python interpreter, you can do so as well.
2- You do not necessarily need to install Jupyter Lab to run LLAMA2, as it is a standalone tool. LLAMA2 provides its own command-line interface for running experiments and analyzing results.
3- To install LLAMA2, you can follow the instructions on the LLAMA2 GitHub repository. You do not need to sign up for GitHub to download the repository, but having a GitHub account can be useful for tracking changes and contributing to the project if you wish.