I can't stress enough how important your jumping mechanics are for Double Unders, so it's worth spending some time trying to get them right! Jumping incorrectly is going to bring your DU progress to a standstill.
I've condensed some of my favorite DU jumping tips into this reel for you, but if you'd like to get a little more in-depth, download my free guide at i.mtr.cool/acevqaezhn