seo – the URL is not on Google. What does it mean and how to fix it?

I am new to page optimization for search engine rankings and I just got Google Search Console.
So every time I try it URL Inspection tool with the homepage of my site i get this message:

The URL is not on Google

This page does not appear in the index, but not because of
a mistake. See the details below to find out why it has not been indexed. Learn
more

Here is a more detailed view:
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I feel really frustrated because I do not really know what that means and there is no concrete information on how to solve this problem.

However, when I try the Test the URL live feature I get the following:

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This seems a little ambiguous and I do not know if I should be worried?

I've tried to adhere to the most basic SEO practices so that everything written on the page is moderately correct and does not pose any critical issues such as noindex etc.