Oh dear God....
There is no "pathway" to becoming a star. There's no book you can buy, no test you can take, and no audition for the job because it's not an actual position.
Egregiously untalented celebrities notwithstanding, real talent is still a requirement for any success in show business. I don't mean to be rude at all, but your estimation of your daughters qualities and skills is completely untrustworthy -- you're her mother, so of COURSE you're going to think she's phenomenally talented. In other words, your certainty of her talent is NOT a guarantee that an audience of strangers is going to share your opinion.
So please don't make "stardom" your primary goal -- to do so will doom your daughter to mediocrity. Instead, she needs to focus on simply being the best she possibly can, and always strive to both improve and learn new things. What you don't realize is that someone who becomes a "star" does so by being involved with a project that becomes very successful and popular -- lots of people see it, and therefore the artist is obviously being seen by many people. And there's more -- it's also got to be a role that really strikes people's fancy as being interesting and well-written. And so, if a potential blockbuster project crosses your daughter's pathway, but she hasn't done the preparation work up to that point [training and garnering work experience in smaller projects], she simply won't get cast and the opportunity will pass on to someone who IS prepared.
I don't mean any of this to be harsh. But after 25+ years working professionally in theatre [and some films], I can assure you that the industry requires a massive amount of work. It's a joy, but it's a sweaty joy. :-) And in the term "show business," I assure you that the operative word isn't "show" -- this is an industry that a ton of people are trying to be successful in, so one really needs to be willing to do the requisite work.
Oh, and by the way -- all of what I've written is with the assumption that your daughter wants this as well. If you're somehow pushing her into this [as I've seen far too many stage mothers do], she's not going to be happy at all. Children are not canvasses for parents to paint their fancies on -- they're individuals who should be given the freedom to choose what career they want.