There is no one-size-fits-all answer to this question, as the best way to say ə depends on the individual speaker's native language and dialect. However, some tips on how to say ə correctly include:
-Pronouncing ə as a schwa sound (like the "a" in "about" or the "u" in "circus").
-Practicing saying ə in words that contain it, such as "banana," "America," or "comma."
-Listening to native speakers of English say ə and imitating their pronunciation.