Docker for Raspberry pi

As a Docker newbe, I am looking for discussion about getting docker running on my Raspberry Pi 4. Is there a difference running on a 32 bit or 64 bit install. I have tried following some installations presented on youtube without luck. Could use some help with getting started.
Also once I have tried to get running unsucessfully, how do i remove what I installed.
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Thanks for any help you can provide or direction to where I may find additional help.

This is a very nice how-to that may help. Installing Docker on the Raspberry Pi - Pi My Life Up