I have wanted to ask this for a long time.. I have never worked out how to do this, is it possible?

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mywebsite/pots - This to be an index page showing posts or custom posts

mywebsite/pots/myarticle - This to be an single post

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I usually would just set it up like this to avoid any issues.

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mywebsite/pots - This to be the index page

mywebsite/pot/myarticle - This to be the single post

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I know it goes against the general slug rules, but surely there is a way to achieve this??? It just seems better for structure SEO...

Would love to know your suggestions, thanks.