I strongly recommend you to visit each of these nursing school's website, download their informational packet/pamphlet, and study them well. Each school have informational meetings that you might want to consider attending. But just to give you an idea, prerequisites + lower division GEs will take you about 2 years to complete. Those 2 years are generally considered as your college freshmen & sophmore years. Once you're accepted into any of these nursing schools, you're typically in sophmore/junior status. BSN program from these schools will take about 3 years to complete.
As far as the application process goes, once you've completed the prerequisite classes & some of your lower division GEs, you'll likely need to take some sort of entrance exam (TEAS for example). You'll need to apply to each university & their perspective nursing school. So for example, when I applied to CSUEB's BSN program, I had to submit a university application via csumentor.edu & a nursing program application online through their website. So technically you'll have to submit two applications per CSU. I believe the deadline for university application is typically late November. Nursing school application deadline varies. Typically when you submit your university application, you'll want to list "pre-nursing" as your major. Once you're accepted, your major will be changed accordingly. Hope this answered most of your questions. Good luck!