I started out of nursing school
on a cardiac telemetry step-down in a big teaching hospital. I worked there for a year and a half before transferring to their CVICU. There we get frequent transfers in massive cardiogenic shock and cardiac assist devices from outside hospitals via survival flight.
You are one step away! Sounds like you'll be in good shape.
The other thing I forgot to add is that you will want to make sure you work with peds at some point. Our ER has two separate ERs, with one just for peds. Not sure if yours is like that or if you will get all of them in which case it'll be easier for you and you'll have to spend less time getting your peds experience.
I had looked extensively into flight nursing at one point, but ultimately decided that it probably wasn't for me. Never completely closed it off as they are all awesome, insanely intelligent rockstars, but just some of the cases they have to transport...I am not a squeamish person but would have difficulty transporting an infant with their face blown off by gunshots...