It is good to hear that you are trying to help your daughter by trying a different approach.
I would really suggest that you read, "The Right Side of Normal". Assuming that she is right-brained, it will really help you understand how she learns and if the school that she is in does not take the right approach for her.
It can be daunting to be the one responsible for your child's education, because you fear that you will fail him/her. But remember that the school system fails many, many children and is no guarantee -- the only thing is that you can blame them instead of blaming yourself if it doesn't seem to work out. There are no guarantees in life or parenting, but I think that it is always a good idea to let your child be themselves and pursue what they love. So what if they become financially successful but hate what they are doing? Wouldn't it be better to be a happy hair-dresser who feels like she is contributing to the world than to be a lawyer who dreads going to work each day? Not that homeschoolers or unschoolers can't become happy lawyers if that is their love and desire.
All the best to you and your daughter!