Be aware though, depending on your level, once you do start the main quest you jump right into elder dragons.
Meh, this is going to happen with whatever you do later in the game (scaled enemies who will eat your lunch). Depending on character, I found the nastier dragons easier to handle than the Superman Draugr that you'll run into in every dungeon at higher levels, who will lol at you immediately before spraying your brain across the wall.
That and Forsworn Briarhearts. Nothing like getting two-shotted with a character that's almost bored killing literally everything else in the game.