By "Woodpecker method" do you mean this:

https://www.amazon.com/Woodpecker-Method-Axel-Smith-Tikkanen...

?

This is why HN is great -- appears to be an amazing book.

I'm at 2250 on Lichess, and I consider openings a waste of time. Ok, I confess I wasted a lot of time on them in the past, and my rating was rather constant for years and years, until I started tactics via the woodpecker method. It's hard work, but definitely worth it. (quite a few of the easier exercises are opening tactics)

https://www.amazon.com/Woodpecker-Method-Axel-Smith-Tikkanen...