Before I started CG, I clarified with V05 Kiwi lime. My thinking was that I could start with a clean slate. My results turned out to be pretty good IMO.
Also wanted to emphasize that reading the book is important. It has all the info you'll need to help you along.
Congrats on your decision to go CG!! My hair loves it!
note there will be a small adjustment period for your hair/scalp to get used to co-washing. Good luck!