Dear English speaker, please help me.

Both "see" and "hear" Can be accidental.. You do not need to try to see or hear. An explosion of flash of light just happen and you see or hear them..
Look, watch and listen all include intention. You hear a voice on the telephone, because you are listening...Similarly you look at your watch to see the time.. To "watch" for something usually has a longer length of time.. You watch a TV program or watch your child at play. A "look" is generally a shorter period than a "watch"😷