You should meet with an advisor at the college you plan to attend. In most cases, there is a waiting list for the nursing program. In some cases, applying early will be enough, in other cases, the wait is longer, therefore, taking prerequisites is very helpful.
Many community college programs are no longer considered two year programs but 2.5-3 year programs.
For my senior year of high school, I did a half day at the high school to meet my minimums and also took 2 courses per semester at the community college. I was then able to go directly into the nursing program after high school graduation.
Best of luck to you!