Hey, When riding in Prince's in London, which is also CCW, I ride goofy (right foot forward) which is switch for me, but there are 2 90 degree corners.
As the everyone said above before look for the bouys at the corner, about 10ft before the bouys I take a gentle cut out on my heels and try to pass through the bouys, pretty close to the outer bouy.
Watch the carrier, before it rounds the corner, I would slowly let the handle away from my hips, as the carrier rounds the corner I begin to pull it back into my hip, this allows me to cheat and minimise any drop in line tension. It's the drop in line tension and the sudden catch that whips you.
After a day or so you should be more confident and better able to handle the corners and be able to get around while keeping the handle in at your hips.
Hope that help