Although WordPress is extremely easy to use, there is plenty of help for the new user.
The starting point is the WordPress Codex. This provides step-by-step guides to getting going with WordPress. Changing the look of your WordPress website is possible with just a few clicks. See the Themes section of the Codex for further help.
If you choose a specialist WordPress hosting company, they will be able to provide additional help and support. Many include sections of their website dedicated to WordPress.