LaTeX generates multiple files for a single document, so you may want to create a folder for each document you make. Now that you have a folder for your document, consider moving the bibliographic reference file (e.g., .bib file) you created into it. This is not necessary, but it's good practice to have everything used for the writing process in one place. Once you've saved the document, you will be able to compile it. The keyboard shortcut for compiling in Texmaker is 'F1'. When you compile, a nicely formatted pdf should appear beside your LaTeX code. If you do not see the pdf, make sure the Pdf Viewer is toggled on.