There is a lot of information online for getting started with WordPress. This is assuming that WordPress is the best tool for you, as there are plenty of other platforms you could use if you want a simple blog. Some folks feel that they are happy for a while with sites created with Squarespace, Wix, Weebly, etc, but eventually they become frustrated with the lack of options and functionality. It depends on your long term goals. Start with planning your website before deciding which software is best for your needs. Let me know if I can help with this decision or with planning and building your site.
WordPress for Beginner’s Useful Links
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Recommended Reading: Alina Wheeler’s Book: Designing Brand Identity