This video is very comprehensive tutorial about creating a wordpress backup which covers these lessons.
1. Install and activate backup plugin (updraftplus).
2. Manually create wordpress site backup.
3. Restore site to a previous point using backup.
4. Schedule backups/ automate wordpress backups.
5. Configure backups to be uploaded to google drive and other cloud service automatically using updraftplus plugin.
6. Check all backups are working properly.
Note: This video is copyrighted. Do not copy without permission.