The good news is, you'll get better...regardless of your current ability.
I learned a ton from that course. I'm a sllllooooowwwww person (I procrastinate), so I'm still taking the course after a couple of years. I often use the resources and review my course manual.
Actually, one of my early assignments was just published (with a LOT of editing to meet the publishers criteria).
Anyway, good luck with it...enjoy!