You can search for help pages by using the prefix "Help:" in the search box or by visiting the help portal (listed in the left sidebar).
The Task Center provides an overview of different ways you can help out. Find one that suits you and jump in!
These tutorials have covered everything you need to know to get started — the best way to learn now is by editing!
As you spend time here, you'll learn more about how Wikipedia functions as a community. You may want to catch up on the latest happenings in The Signpost, our newspaper. You can also browse the massive essay directory to read contributors' thoughts about every aspect of the project.