unsophisticated

adjectives

not wise in the ways of the world
"either too unsophisticated or too honest to promise more than he could deliver"; "this helplessly unworldly woman"- Kate O'Brien
unsophisticated, unworldly
lacking complexity
"small and uncomplicated cars for those really interested in motoring"; "an unsophisticated machine"
uncomplicated, unsophisticated
awkwardly simple and provincial
"bumpkinly country boys"; "rustic farmers"; "a hick town"; "the nightlife of Montmartre awed the unsophisticated tourists"
bumpkinly, hick, rustic, unsophisticated