So I thought I was ready for Crossfit...WRONG!

A couple of the WOD's were doable...difficult, but within my reach. Then these insane ones started coming, and I humbly realized that I'm nowhere near as strong as I thought I was. So here I am!
My background: I have years of off-and-on weightlifting/bodybuilding experience, and am an avid martial artist, having dabbled in wing chun, Muay Thai, boxing, and now doing Eskrima (Filipino martial arts). I have a powerlifter build but would like to get leaner, faster, and more balanced than I've ever been.
I'm gonna start with Level 1 today, but I'm gonna test myself by doing the Day 2 workout just to see how long it takes me to get it done. If I blast through it in less than 5 minutes, I'll step myself up to Level 2. My main obstacle will be the pullup, and here's the thing that makes it frustrating:
I can do 100 pushups in 2 sets with little rest, and I can do LOTS of bodyweight squats (I'm a big fan of the Hindu squat!), but I can BARELY do one...count'em...ONE pullup! So yeah, I think I'm going to alternate by doing 3 negatives and then doing 3 "cheat" pullups (jumping up into it), and repeat until I get the required amount for the round. And yes, I'm aware that 3 subs equal one normal, so this is gonna be one hell of a workout! I'll keep ya'll posted.
One more thing...I tell ya, after years of doing "hardcore" weightlifting and bodybuilding, this "boring" bodyweight stuff RULES! It's really humbling and fun as hell. I love it.