I presume you are on a Windows computer. To create a word document, open word, and select Blank. Next, type whatever you want in the word document, and press ctrl+S to save it (cmd+S on mac). The first time, a pop-up should come. Give it a name, and browse files until you find the place where you want to save it. You can also save it on your onedrive. Now quit Word by clicking the x at the top of the screen. To open a word document, you can either open Word and look for your file there (it should be top of the recents tab), or you can press the windows key, click documents, search for your document, and double-click to open it. I don't remember fully, but in the menu bar inside word, next to Home, it should say File. Click on that, and I think there should be an option to close the file.