It probably doesn't include it because you should already have knowledge of mysql before trying to run a server with it.
1. Turn on mysql
2. Open Navicat
3. Click Connections
4. Fill out the form
5. Hit test connection
6. Does it connect? No - Step 4. Yes - Step 7
7. Hit ok -> ok -> Double click on your new connection -> Double click on the database you want to edit. Try things out and don't forget to keep a backup of your original files.