Press your lips together. Air flows through your nose. Vocal cords vibrate.

Americans pronounce memo as MEH-moh (/ˈmɛmoʊ/). Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "Many members missed the Monday morning memo".
Record yourself saying "memo" and play it back. The mic stays on your device — nothing's uploaded.
2 syllables, 4 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
The textbook way isn't wrong — it's just not how anyone actually says it.
Stress falls on the first syllable, not the others. Stretch MEH — keep everything else short and quick.