Grant was a West Point graduate, just as Lee was.
Grant as a good guy and there is just as much to admire in his life as there is in Lee's life. There were no villians in the Civil War... okay except for Sheridan. There was honor and valor in the Union and the Confederacy. That's why studying the men who fought it is so rich and deep.
If you want to draw an analysis between Grant and Lee, Grant graduated from West Point in 1843, ranking 21st in a class of 39. Lee graduated second in his class of 46.
Grant was under educated.