How Do I Make a Url Link With Icon Pic Of My Choice In My Dock On Mac Monterrey?

I am attempting to make a bookmark on the dock. I’ve done it before but I can’t remember the process. I don’t want to drag the URL to the desktop, then down to the dock. I’m attempting to keep my desktop clean. Please help me get the url to the dock with out having extra on the desktop.
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Moving a link to the dock from the desktop duplicates the url; however I’m unable to delete the desktop icon as the url on the dock will not retain the url address. The world icon however is a url link that isn’t linked to desktop. I can not remember how I did this. The world link icon is the process I want to replicate; please help…. Also, I would like to change the image for the world icon but I don’t know how to do that either. Please help, I’m a novice but I quick study…… Any assistance you offer is truly appreciated.
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CJ