BEGINNING: The American Sign Language (ASL) sign for "beginning / start / begin / initiate"

Hold your non-dominant hand out in a flat handshape with the fingers together except for the middle and index finger. Place the dominant index finger at the base of the non-dominant index and middle fingers and twist the dominant hand.

If you want to convey going back to the beginning / to back up and begin again you can sign:

Notes:  See: STOP

PAUSE

CAUSE