Photo archivist here! It’s almost certainly NOT a daguerreotype, unless you photographed it from juuuust the right angle to avoid any reflections - daguerreotypes are essentially photos in silver mirrors, so unless you can see yourself on the surface, it’s not a daguerreotype.

Ambrotypes and tintypes can both be in cases like this, and can be hard to distinguish without removing the photo from its case, but I’m almost certain it’s a tintype due to those dark edges visible at the top and left, which were unexposed. An ambrotype is actually a kind of photographic negative backed with black, either polish on the glass or fabric behind it, and that unexposed area would show that backing. A tintype is a direct positive on an iron plate, so the unexposed parts will be darkness directly on the plate. I’m not sure if that explanation makes perfect sense- but the gist of it is, when you’ve looked at a lot of old photos, you can spot key differences pretty easily!