Awww, I'm sure you felt flattered

That's so nice.
Perhaps since it'd be your first time coaching, maybe do it for free as a friend to gather some experience. Then should you be offered a business coaching position in the future by someone else, you'd already have the practice with confidence.
I'm not sure if that's a good idea though, but that was my very first thought when I read your post.
If you don't feel comfortable with it - as Kylie offered you a great suggestion - be part of her support circle and help her find a qualified business coach.