Let me know if this tutorial helped you.
Installing a font is normally rather easy, if your computer does as it is told! Once you've download the font - go into your download folder. Open the font and double click.
This should cause the font file to open, a popup should appear with a sample of the font. If this does not happen then just right click on the file and choose "install", if this does happen then click 'install' that is placed about the header.