For me "hétéroclite" and "diversifiée" are quite différent :
hétéroclite = fait d'éléments disparates, bizarres. (a generally rather negative meaning, whereas "diversifiée" has a rather positive meaning).
It would certainly help us if you could explain the type of "diversity" you would like to immerse yourself into.
Do you mean that you would like to live among people who speak different languages, who have different ways of life, different interests (culture, art, education …); is it economical, … ?