By default, the latest version of WordPress is pretty darn secure. The development team of WordPress has considered anything that might have been added to some secure your wordpress site plugins. In the past , WordPress did have holes but most of them are stuffed up.
After spending a few days and hitting a few spots around town, I finally find a cafe that offers free, unsecured Wi-Fi and read more to my pleasure, there are a ton of folks sitting around each day connecting their laptops to the"free" Internet services. I sit down and use my handy dandy cracker tool that is Wi-Fi and log into people's computers. Bear in mind, they're all on a network that is shared.
You first need to create a user with administrator rights before you can delete the default admin account. To do this go to your WordPress Dashboard and click on User -> Create New User. Then enter all of the information you need to enter.
Now we're getting into things specific to WordPress. You must rename it to config.php and alter the file config-sample.php, when you install WordPress. You need to set up the database facts there.
But realize that security is. Do not just be the type that is reactive, take action to start today protecting yourself. Do not let Joe the Hacker make your life miserable and turn all in creating come crashing down in a matter of moments, that you've worked hard.