Reset or Restart the Deck?

I’d like to start using Anki again to study Korean but right now, my deck has cards that have been expired for over a year, and more..

What’s the best thing to do? Should I restart the deck without modifying it, and maybe create a new deck along the way with the words that come up (this way I’ll have new due dates but at the same time I’ll start studying from the words I’m more likely to remember)? Should I reset the stats (how exactly do I do that)? Or are there better methods?

I’m not an expert in spaced repetition, so I’d really appreciate your help. Thank you!