Question: in destiny 2 how do you get your sparrow?
Answer: Complete the Destiny 2 Campaign.
Head to the rebuilt Tower and speak with Amanda Holliday in the Hangar.
Holliday will let you choose one of three basic Sparrows - at no cost.
If you want a better Sparrow, Everis (on The Farm) will give you a free Bright Engram box once you've completed the Destiny 2 campaign.