...Save your work
File (upper left) > Save.
If it's the first time you're saving your work, you'll be asked to give the file a name. You'll also need to select where you want the file saved (ie. your stick drive or OneDrive, etc.)
...create a hanging indent
...set line spacing
...set / adjust margins
...do a spell-check and word count
SPELL-CHECK: Click the Review tab, then Spelling & Grammar, then Spelling.
WORD COUNT: Click the Review tab, then Word Count.
If there's only a portion of text you're checking, just highlight that text, then follow the steps above.
...insert a page-break
...insert page numbers and Headers
PAGE NUMBERS: Click the Insert tab, then Page Number (towards the upper right). Select the one that shows where you want the page number to be. It will then appear on the document in gray; just double-click anywhere in the document to finalize it.
HEADER Click the Insert tab, then Header (towards the upper right). Select the one that shows where you want the Header to appear. It will then appear on the document in gray. You can then fill in the areas where it says [Type here]. When done, just double-click anywhere in the document to finalize it.
...give the document a name / title
See ...Save your work above.