Float Like a Grasshopper

I'm having trouble being springy. My legs are getting in the way rather than propelling me where I need to be. Is it a strength issue? A coordination issue? Probably everything. I blame scrimmaging. It takes forever for me to be useful in scrimmaging. I start off shaky and slow, progressively become spazzy, and graduate to the point where I can avoid some people but still crumble at a block. There's always so much going on that I can't concentrate on getting in any good hits. I usually react after the fact, and then pathetically tap someone with my shoulder, or take out a bunch of people when I fall.

Everyone keeps telling me to use my legs to get in other people's ways, but so far they're just tripping me up.