fix hacked wordpress site will inform you that there is not any htaccess inside the directory. You may place a.htaccess record in to this directory if you would like, and you can use it to manage usage of this wp-admin directory by Ip Address address or address range. Details of how you can do this are plentiful around the net.
Essentially, it all will start with the basics. Attempt to use complex passwords. Use letters, numbers, special characters, and spaces and combine them to make a password. You can use usernames that aren't obvious.
It's a WordPress plugin. They are drop dead simple to install, have all the features you need for a task such as this, and are relatively inexpensive, especially when compared to having to hire someone to get this done for you.
Make a note of see your new password! I recommend the version of the software *Roboform* to remember your passwords.
Implementing all the above will probably take less than an hour to complete, while creating your WordPress site more immune to intrusions. Over 1 million WordPress websites were cracked last year, mainly due to preventable safety gaps. Have yourself prepared and you're likely to be on the safe side.