Calibre does not have a "native" way to mark books as read. Using the rating column or adding a tag is the closest you can get. The key term for most of the suggestions is "custom column". That is a column you add to calibre to store the information you want for each book. You do this in the preferences and the screenshot @ownedbycats posted showed an example of doing this.
But, the first thing you need to decide is how you want to indicate a book is read. Or how much information you need. Do you need when you read it? Do you rate the books? Or is a simple yes/no enough?
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