One way to practice adding this sound to your words if your accent tends to leave it off is to say pairs of words with and without initial h. Listen to the words below. Say each pair, making a clear distinction between the word with the “h” and the word without. Then try the rest of the list for extra practice.
have ave he E how ow hate ate heat eat hi I his is hey A hoe O | hold old heel eel heart art hedge edge had ad hand and has as hear ear hair air |