But are you talking about an understanding 'after' you are an RN? If you don't yet have the course-work to understand the predominant-bottom-pecking-order duties, then how does that add to your understanding other than tangental trial-and-error observation effects: which may be 'student theorems' and not valid at all.
For example, I learned physical work effects of using a shovel for hours on a range of anthroprometric variable subjects. Having done that younger, all it did was permanently 'break' my back needlessly. The engineering education was too little (for my body, but not others), because it was too late.
Although not exactly a direct comparable observation, CNA is harder duties than most might expect in a hospital environment assembly lining unnatural postures routinely: where the weight of your limbs leveraged in unnatural skeletal stressed positions, become disabling tasks in the long run, down the line.
I'll do it, because I'm extremely durable (considering and so far, lol). But in some ways, the wiping hineys is the better jobs compared to washing overweight bedridden people unassisted, and or just reaching for objects constantly stretched AND bent over the patient.
But like nursing, there's a wide range of CNA job settings. I for one, and going to use feedback from experts on this site to help guide me to my initial position. WORK SMART, NOT HARD!