Here's a selection of different videos explaining the Circle of Fifths. The more you listen to these types of things, the more it will sink in.
And here is an external link to a more in-depth and yet still understandble explanation of the Circle of Fifths. I used this as well as other information on the internet to put together the handouts I gave you which you'll find posted above: https://www.musical-u.com/learn/how-to-use-circle-fifths/
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