I know he won independence for Ghana, was somewhat socialist and later he carried out crackdowns on opposition parties and the press with the stated reason being to prevent imperialists regaining ground in the country before being overthrown in a military coup that was allegedly backed by the CIA. But beyond that I don't really know anything about him, curious if anyone has any recommended further reading beyond just his wikipedia page
The CIA basically overthrew him because writing Neo-Colonialism, the Last Stage of Imperialism was the last straw for the CIA.