The ‘H’ is just air coming out of your mouth. Breathe out hard; your lips and tongue stay still.
Practice with bubble liquid. Using the bubble wand, try to blow bubbles when you say your ‘H’.
Practice with these tongue twisters:
“Hip, hip, hooray!”
“He who laughs last, laughs hardest.”
“In Hertford, Hereford and Hampshire, Hurricanes hardly ever happen.” (from the play Pygmalion (My Fair Lady), by George Bernard Shaw)
“Hit ’em high, hella height, historical hey holocaust hints hear ’em holler at your homeboy…” – (from Blackalicious, Alphabetical Aerobics)
“I said a hip hop the hippie the hippie to the hip hip hop, a you dont stop…” – (from Sugarhill Gang, Rapper’s Delight)