A Rescue Story

There is an opportunity for a ?but?.

At the end think of adding a complication from your story.

... but soon discovers he needs the help of others to succeed.

Probably not your story. But you get the point.

I had an idea of using an amulet to be able to defeat the dragon after it killed his father.

So something along the lines of....

After his father is killed by a menacing dragon , a cowardly farmer must use a sacred amulet to kill the beast after it destroyed his village and kidnapped his wife.