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

Americans pronounce hoop as HOOP (/hup/). You'll hear it in sentences like "He threw his new shoes straight through the hoop".
Record yourself saying "hoop" and play it back. The mic stays on your device — nothing's uploaded.
1 syllable, 3 sounds. 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.
In "hoop", the "p" is not released — the articulators get into position but hold without the burst of air. Air stops but there's no release burst — the articulators hold position.