Well, it would then be an F-1 student visa. But first, keep in mind that even if you become a U.S. Citizen, when you file for her it will take 11 years roughly before she can get a green card. This means that if she is on F-1 and you file for her, she cannot travel while on the F-1 nor can she apply for a transfer of schools for 11 years. Why? Because the I-130 is evidence of immigrant intent and for the F-1 and OPT after, she needs to show non-immigrant intent. If she travels outside of the U.S. or transfers schools or applies for OPT, they will see the I-130 at that point and may deny her. So really, you probably should let her go through the process as any student might. So how is that?
Well first she has to find a school willing to accept her. Here is a link:
After that, the school would help her (usually for free) to get an F-1 student status.
After she graduates, she can start another degree program or if she finishes with a bachelor's degree or higher, she can then apply for Optional Practical Training (OPT) to work for an employer in the field she studied. Then after that, the same or a different employer can file an H-1B professional visa for her. Then after that, the same or different employer can file for her to get a green card. That is the long road, but many students do it.
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