Flare your lips and lift the mid-front tongue close to the roof of your mouth. Blow air through without voicing.

Americans pronounce shoe as shoo (/ʃu/). You'll hear it in sentences like "Choose a new shoe" or "She showed the shiny shoe to the shop" — more examples below.
Record yourself saying "shoe" 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.