From your Google Doc page, 1) click on the font type icon and 2) select your font type from the drop down list. For both MLA and APA you will select Times New Roman.
Next, you need to set the font size to 12 for both MLA and APA. 1) Click on the font size icon and 2) select 12.
From your Google Doc, 1) click on File from the menu and 2) select Page Setup from the drop down menu.
Next you can set the margins as you need them to be and click OK. MLA and APA both use 1 inch margins all around which is the Google Docs default.
From your Google Doc, 1) click on the Line Spacing icon (looks like lines with an arrow up and down) and 2) select Double from the drop down menu.
From your Google Doc, 1) click on Format from the menu, 2) put your cursor on Line Spacing and 3) select Double from the pop out menu.
From your Google Doc
1) click on the Insert menu
2) move your cursor to the Header & page number selection
3) move your cursor to the Page number selection and select the page number setup you want (usually the page number top right as show in the image below)
Create a Hanging Indent Using Google Docs