Remote Development With PyCharm Pro

Hello! I am new to PyCharm and I am looking to leverage the remote development capabilities of PyCharm Pro. My situation is that I have a headless server where I have various directories that contain python code for different applications that I have written. I need the code to run on this remote box because only it has access to the resources the code manipulates. So for, I have SSH'd into the server and used EMACS to edit my code and ran it from the CLI. I would like to be able to use power of the PyCharm IDE but still run the code on the server. I know there some some posts related to this but there are still some questions that are not clear. So here they are:

1) I have existing directories that represent projects on the server. I want to start using PyCharm for development but still run them on the server. I understand that I need to configure a remote interpreter. What is the best practice to import/manage the files? Is it any different for code and data files? I see that there is an option to edit a file on a remote server, what is the use case for that option versus importing the file locally?

2) Regarding virtualenv and remote server/interpreter. I want to virtualenv to be relative to the remote server. Is this possible? If so, how do I set that up?

3) I am looking at setting up a centralized GIT server, how would that changes the answers to the above?

Thanks in Advance!