Push a stream of air from your throat through your open mouth. No tongue or lip contact.

Americans pronounce whoever as hoo-EH-ver (/huˈɛvər/). Stress falls on the second syllable — keep everything else short and quick. You'll hear it in sentences like "Whoever wrote the work was wise indeed".
Record yourself saying "whoever" and play it back. The mic stays on your device — nothing's uploaded.
3 syllables, 5 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 second syllable, not the others. Stretch EH — keep everything else short and quick.
Americans use a relaxed retroflex R — the tongue curls back rather than rolling. The R is one continuous sound with the vowel before it, not two separate sounds.