It’s the same “an” as in “cent” because “an” and “en” are homophones (while French has way too many ways to write the same sound, unlike English it has the decency of being almost completely deterministic in its pronunciation).
But don’t feel bad, these sounds aren’t even close to being natural for English speakers because you never use your throat in that way and have no close equivalent (sand is still quite far, I’d say depending on the accent it can be closer to “è” than “an” lol).