Reincarnated Into Httyd With A System But I Don't Watch Httyd

Hi I'm Gregory and if been reincarnated Into httyd the bad thing is I'm not all that familiar with httyd. I know about it some because my little sister is obsessed with it. I know that there are dragons, Viking, villains like dagger or something like that and viggo, the main character's name is hiccup haddack, and he rides a night fury named toothless but that is mostly it and I can't seem to recall the main character's love interests name so there is that.

I plan to just live my life unfortunately things aren't going to go as smooth as I thought