Touch the front of your tongue to the roof of your mouth, then release into a 'zh' position. Add vocal cord vibration.

Americans pronounce joe as JOH (/dʒoʊ/). You'll hear it in sentences like "Joe drove the boat slowly to the remote zone".
Record yourself saying "joe" and play it back. The mic stays on your device — nothing's uploaded.
1 syllable, 2 sounds. Explore each sound's mouth shape and how it's made.