Listening to history podcast I learned that the “Puritans” didn’t called themselves that, they referred to each other as the “Godly”, other’s called them (at the time) Separatists, and they left the UK to go to Holland first, which they left because Holland had too much religious freedom for them to tolerate, and they didn’t like their children learning Dutch.
On scouting about, when they landed at Plymouth Rock, they came across some native graves, which they uncovered, and robbed for the corn that was buried alongside the dead, and the first actual live native that they met; Squanto, could speak passable English, he went to England, and when he came back, he found that most of his tribe had been killed by plague.