This is exactly the route I am taking...
Took CNA training this summer, talked an AD into letting me into the ICU as a new CNA (I promised to go quitely if everyone didn't think I was doing a good job after 2 weeks). And I start RN school this March.
I have learned soooooo much that I never would have if I had been on a med/surg floor. I made it clear when I started that I wanted to work as a RN in ICU and I would learn anything & everything anyone wanted to teach me.
We are a busy ICU with lots of variety, I get to see it all from bone marrow to CVVH to nec afas. (flesh eating stuff) and the RN's have been really good about walking me through everything they do.
The hospital had already signed me off on phelb. so I can do all the lab draws I want, I have learned IV sticks (can only watch but hey I get to hear all the tricks), help with drsng chngs from op sites to full on heavy duty open wound irrig., foley placement, taping et tubes, help with ng placement/tape chgns, setup and watching monitors/strips....it just goes on and on.
Of course there is helping with baths, stocking and cleaning, but hey at least I will know how to take care of myself and where everything is at.
I am sure this is the unit I will work in (I am in a hospt sponsered Rn program & the AD's have assured a job) so I joke that I am on a 2 yr orientation

I absolutely recommend this route to anyone who wants to work in an ICU as a RN, you get lots of time to learn and if you work with good people they will accept your mistakes as a new grad much easier

Enjoy,
1 leg lance