Learn Microsoft Word First
When I teach people about computers I always tell them a great place to start is with Microsoft Word. I can only speak for myself, but when I teach people Microsoft Word I also teach them a lot of little things that will carry over into other things they will do on their computer.
When you learn Microsoft Word via my tutorials, which are completely free, you will lay the groundwork for a strong foundation in which to learn Microsoft Excel, Microsoft Outlook, Microsoft PowerPoint and many other Microsoft products.
Last but not least, the subtle Windows tips I will teach you will help you everywhere on the computer.