Sorry for taking some time, monday morning suddenly hit me in the face... I've put up some files here that you should be able to download. The files can be opened with any plain-text editor (notepad, textedit, or similar).

My recommendation is to create an account on overleaf, click "create new project", and upload the files there. Then you can hit "recompile" to see how the document looks. My guess is that you'll figure out how stuff works pretty quickly just by modifying that file. If what you want to write is a simple document, you can really just get going :)

Feel free to let me know if you have any issues :)