This isn’t a criticism of the film, but kind of a Fridge moment for me: How does Finn know how to pilot a sandskimmer? (Vaguely; he forgets to engage a certain stabilization thing but seems to have no issues after that) Wasn’t the whole reason he teamed up with Poe in TFA because he didn’t know how to pilot aircraft? I don’t think it has to do with being unfamiliar with a TIE and familiar with the sandskimmer. After all, Star wars seems to imply that piloting experience is a transferable skill; piloting one ship means you’re good at piloting them all. Nevermind that the Sandskimmer seems like it’s supposed to be a vehicle that was outdated before Finn was born, so he’d likely never be trained to pilot one.
There’s a difference between piloting a speeder and an aircraft. A speeder is more like a car, while an aircraft is like an aircraft. I don’t think it’s hard to imagine that Finn knew how to operate speeders (in fact he does so in one of the TFA deleted scenes).