It is impossible for anyone in less than 8 weeks (56 days) to learn everything in American politics, all the bills passed by McCain in the last 24 years, and everything needs to learn to run higher office.
But Sarah Palin will learn and not to make herself as a fool.
She still need at least 1-2 years on-the-job training to be a savvy politican.
But I think she will return to Alaska to finish the term of Governor and run again for the Governor job or run as a US Senator from Alaska.
As far as higher office goes, I think she will lose some appeals unless she has to re-define herself in many controversial issues, like abortion, ANWAR drilling, environmental issues and many more.
She is a bright person, but abrasive and power-hungry.