I know people love to say that people who say “kids today are lazy” are out-of-touch… but… this is just a Google search away. And you can buy them everywhere. And you can ask literally anybody. I never had a problem figuring this out with my absentee-ballot.
I’m surprised requiring a stamp is tolerated. I’d expect shrieking about poll taxes and racism. Would think postage would be prepaid, but I’ve only ever voted in person.