In my view, the best way to ensure your is through the use of a fix wordpress malware plugin backup plugin. This is a relatively inexpensive, elegant and easy to use way to be certain that your site is available to you.
No software system is resistant to bugs and vulnerabilities. Security holes will be discovered and bad guys will do their best to exploit them. Keeping your software up-to-date is a good way to stave off attacks, once security holes are found because their products will be fixed by software vendors that are reliable.
Before you can delete the default admin account, you need to create a user with administrator rights. To do this go to your WordPress Dashboard and click on User -> Create New User. Enter all the information you will need to enter.
Note that you should try this last step for new installations. You'll also need to change all the table names inside the database, if you might like to do it for installations.
Just make sure you decide on a plugin that is current with the current version and release of WordPress, and you could try here which you can schedule, restore and replicate.