If you're trying to sign a word that starts with "H", you would use the sign for that entire word.
For example:
* House: The sign for "house" is made by forming a "V" shape with your index and middle fingers, then moving your hand forward as if you are pushing a door open.
* Hello: The sign for "hello" is made by waving your hand back and forth in front of your face.
Let me know if you have any other questions about ASL.