The Elder Scrolls V: Skyrim Special Edition

Story based and cannot be missed.

After returning from Bleak Falls Barrow, and obtaining the Dragon Stone, you'll get word that a dragon has been spotted near Whiterun, and the Jarl will ask you to help deal with this threat.

Follow the all-knowing arrow and you'll run in to the Jarl's right hand, Irileth. Her and a small entourage will head towards an old watch tower that has been destroyed by the dragon.

The ensuing fight, as with all fights, varies on the difficulty you have. I left it at default and didn't have much issue at level 5, wearing all heavy gear and using a two handed sword. You can make it easier by lowering the difficulty and/or using range weapons like bows or magic.

After killing the dragon, you'll absorb its soul and earn the achievement.