Here’s a snippet of code to display all WordPress posts alphabetically. Typically, you would list archives using the date they were posted, but there might be a need to list the posts alphabetically. You would normally place this code in your Archives Template page.
<!--?php wp_get_archives('type=alpha'); ?-->
If you’re new to WordPress and you want to learn more, I recommend you dig into the WordPress Codex, which is the online manual and living repository for WordPress information and documentation. As a newbie, you can start learning how to use WordPress, then work with Themes, and maybe even write a Plugin or two. If that’s not your forte, then maybe you can contribute to the WordPress community by becoming a tester by reporting bugs, or work on the online documentation. See link below.