I'm not an expert on the 1619 Project.
In addition to the New York Times announcement, I suggest that you read the critiques of Guelzo, McPherson, Gordon Wood and others.
The NY Times described the Project as:
a major initiative from The New York Times observing the 400th anniversary of the beginning of American slavery. It aims to reframe the country’s history, understanding 1619 as our true founding, and placing the consequences of slavery and the contributions of black Americans at the very center of the story we tell ourselves about who we are.
The Project maintains that the United States was founded as a "slaveocracy".
Historians respond:
1619, the year that the first African slaves were brought to America, marked “the beginning of the system of slavery on which the country was built.” But there were already slaves and various other forms of indentured labor in the Americas as there were all over the world. To say that there were slaves in America is not to say that “the country was built” on slavery. Moreover, the African slaves were not “kidnapped” by American or British slavers, as Hannah-Jones asserts, but were sold by other black Africans who were happy to profit by selling people they had enslaved to the colonists.
These excerpts are from an article summarizing some of the criticism. After the author's venting on partisan politics (worth skipping, regardless of your political affiliation), it describes the Project and reaction.
<"1619 and All That: on the New York Times's Recent Disinformation Campaign",
The New Criterion, Volume 38 Number 5, page 1.(Includes audio report)>
Also see
Nikole Hannah-Jones, "The 1619 Project", New York Times Magazine, August 14, 2019.
https://www.nytimes.com/interactive/2019/08/14/magazine/1619-america-slavery.html
Elliott Kaufman, The 1619 Project gets schooled, Wall Street Journal, December 16, 2019.
https://www.wsj.com/articles/the-1619-project-gets-schooled-11576540494