Congratulations, you just installed Sputnik!
What's next?
First, check if can you edit pages. (Click the pencil icon on this page.) If you experience problems editing a page, check that your data directory is writable by your web server.
Second, click on "register" and create an account called "Admin". This account will be special - you will be able to use it to edit pages that are not editable by other users. You can also create a "regular" account for yourself, calling it something like "Bob" or "Andre".
After that, logged in as "Admin", you can do some customizations. See sputnik for the complete list of options, but here are some basic ideas:
Edit sputnik/config page to change the title of your wiki, set the domain
of your server, a URL for your logo, etc. While there, you can also edit the
NICE_URL parameter to whatever you want the your "short" URLs to start
with. E.g., if you set it to "/mysite/" your wikilinks will point to
"/mysite/Page_Name".
Also, edit the sputnik/navigation page to set your navigation bar. If you are new to Lua, don't get scared. Use the "preview" button to check if your navigation is correct. You can also change the color scheme of your wiki by editing sputnik/css/colors. (See the Customization page on the Sputnik Wiki for more information.)