Srila Prabhupada states that if one is imperfectly educated but sincerely tries to spread Krsna consciousness by preaching the Lord’s glories and supremacy, he will become the Lord’s dearmost servant. There is no material qualification required to preach the Supreme Personality of Godhead’s glories.
Lectures from a disciple, Vol 1, p. 241. SB 7.6.24