The best thing you can do to prepare...study hard and pass your last semester of nursing school
and your boards.
You don't need your soul saved over a job you don't even have yet, and won't even have the necessary qualifications for for probably close to 8 or 9 months.
Wasting brain space on PA pressures and IABP management when they won't be covered on your boards doesn't necessarily seem like the best choice.
Come back and ask this again once you've graduated, passed your boards, and secured a job offer.
And again, best of luck with those things, but don't jump the gun.