The first three Presidents of the United States were:
George Washington (served 1789–1797)
He is widely regarded as the “Father of His Country” for leading the American forces to victory in the Revolutionary War and presiding over the Constitutional Convention.
John Adams (served 1797–1801)
A key Founding Father, he was a leader in the independence movement, served as the first Vice President, and helped negotiate the Treaty of Paris ending the Revolutionary War.
Thomas Jefferson (served 1801–1809)
The primary author of the Declaration of Independence, he was a prominent diplomat, philosopher, and advocate for individual rights and limited government.
Regarding their qualifications, the U.S. Constitution (Article II, Section 1) sets the three formal requirements to be eligible for the presidency (these applied to all three of them, as they met the criteria at the time):
Be a natural-born citizen of the United States (or a citizen at the time of the Constitution’s adoption in 1787; all three qualified as they were born in the American colonies).
Be at least 35 years old (Washington was 57 when inaugurated, Adams was 61, Jefferson was 57).
Have been a resident within the United States for at least 14 years (all three had lived in the U.S. far longer than required).
These are the only constitutional qualifications—no specific education, political experience, or other formal credentials are required (though in practice, early presidents had significant leadership backgrounds like military service, law, or statesmanship).
Informally, their backgrounds included:
George Washington: No formal college education (his schooling ended young); surveyor, planter, military leader (Commander of the Continental Army).
John Adams: Harvard graduate (1755); lawyer, teacher, diplomat.
Thomas Jefferson: College of William & Mary; lawyer, planter, architect, inventor, diplomat.
If you’re asking about something more specific (like education or other details), feel free to clarify!