Here is an introduction video to using BackWPup to backup WordPress.  This video is intended for people who are new to WordPress and the concepts of backing up a site.  Not intended for advanced users.  If you are an advanced user you will be bored out of your mind watching this.  Don’t say I didn’t warn you.

Find BackWPup here:
https://wordpress.org/plugins/backwpup/

Note that BackWPup does not have an option to restore your database.

Here is a post outlining five ways to restore your database:

Here is another post which presents seven plugins for backing up WordPress:
http://www.wpbeginner.com/plugins/7-best-wordpress-backup-plugins-compared-pros-and-cons/