I've had two WordPress blogs hacked into formerly. That was at a time when I was doing almost no internet marketing, and until I found time to deal with the situation (weeks later), these sites were penalized at the main search engines. They weren't eliminated, however the ratings were reduced.
I back my blogs using a free plugin WP DB Backup up. I will always restore my website if anything happens. I use my blog to be scanned by WP Security Scan free plugin and WordPress Firewall to block asks to fix malware problems free.
You can search for software that will backup your database and files. If hackers suddenly hack your website, you can easily restore your website with the use of your backup files and change.
You must create a new user, before you can delete the default admin account. To do this go to your WordPress Dashboard and click on User -> Create New User. Enter all the information you need to enter.
Along with moved here adding a secret key to your wp-config.php document, also think about altering your user password into something that is strong and unique. WordPress will tell you the strength of your password, but a great idea is to avoid phrases, use letters, and include amounts. It's also a good idea to change your password regularly - say once.
There are always going to be risks being online (or even just being alive!) Also it's easy to get caught up in the fear. We often put the breaks on, As soon as we get caught up in the fear. This isn't a fantastic reaction. Simply take some common sense precautions forge ahead. It is going to need to be dealt with then, if something does happen and of quaking in click reference your boots 23, no amount will have helped. If nothing does, all is good and you haven't made yourself sick.