You're using "the cloud" whether you know it or not because cloud is just another word for Internet.
In Episode 177 of What Does This Button Do? We explain more terminology and show how to use a Dropbox cloud storage account to automatically backup all your important files and give you both online and offline access to them. Episode 177 also includes a quick tip about identifying flowers and birds using Google Photos and the Lens
button.
If you sign up for a free account at Dropbox.com and click the option to install it on your computer, you will have a \Dropbox folder on your computer. Anything you save there will be automatically uploaded to the cloud (in your dropbox account) and both the computer copy and the cloud copy will be kept in sync whenever you make changes.