The original Garamond is of course from centuries ago. Now there are now multiple digital versions of Garamond from different font foundries.
If you get the chance, I recommend instead "ITC Garamond Std" or "Adobe Garamond Pro" (both from Adobe Font Folio), especially the former. I especially enjoy the little curve on the serif at the top left of letters such as "r" or "n" which I found to be especially charming, but sadly missing from many Garamond implementations.
A screenshot of a few Garamonds: https://imgur.com/a/dxWHsh0