There is a dramatic difference between razors of different cutting efficiencies (basically, how much of the blade is exposed). Someone with light facial hair and sensitive skin would likely benefit from a milder razor to prevent needless skin irritation. There’s also designs that mimic the experience of a cartridge razor, such as the Hansen razor (makes it very hard to irritate or cut yourself even without learning safety razor techniques).
Walden’s recommendation of a vintage Gillette Tech is a good one, but if you have your grandfather’s razor, that indeed would be the best place to start, as it’s likely just as good as anything you could buy now.