IT CC cream shades are quite limited, although they used to only have 3 so it's a big improvement compared to their early days.
Light will definitely be too dark for you (in the beginning it was their palest shade hence the name but they realised they were missing out a huge chunk of people with paler skin!). I think Fair-Light will be best for you as Fair-Ivory tends to look 'morgue fresh' 😂
Although you have great skin so I'd actually suggest you go with Erborian BB creme instead (in shade Nude). It's very flattering and looks completely natural yet somehow enhances your skin. Best BB cream ever!! (I'm not a fan of Erborian's CC creme though as their lightest shade is just too dark for me).