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

Americans pronounce hobbies as HAH-beez (/ˈhɑbiz/). Stress falls on the first syllable — keep everything else short and quick.
Record yourself saying "hobbies" and play it back. The mic stays on your device — nothing's uploaded.
2 syllables, 5 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
Push a stream of air from your throat through your open mouth. No tongue or lip contact.

Relax your lips and drop your jaw significantly. The tongue tip lightly touches behind the bottom front teeth and the back part of the tongue presses down a little to create more dark space in the back of the mouth.

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 HAH — keep everything else short and quick.