Because WordPress is open source software (meaning it is distributed free and available to anyone to tinker with), there are seemingly thousands of places on the Internet where you can find help. I tend to confine my help searches to WordPress.org.
WordPress.org is the developer and maintainer of WordPress so you are getting information from, as they say, the horse’s mouth. Here are some links to help you when trouble arises or when you simply want to learn more about WordPress:
WordPress Forums – Questions asked and answered
WordPress Lessons – Step-by-step instructions for all the basics