Everyone who responds will give you a different answer as it depends on where you work.
I worked in an ambulatory clinic, LTC, and hospital.
Tiggerbelly gave you a general description of hospital work. Hospital was more 'technical' --- more dealing with various equipment setup/breakdown, lots of vitals and monitoring, some nurse assisting, EKG's (if you're trained as I), 'gopher' work (as in go for this and that to the lab, med room, equipment room), etc. Still cleaned up various bodily fluids, some baths, made beds, changed diapers, feeding, etc.
In LTC, the 'technical' things were not present. Only took a few vitals during the shift whereas 20% of my hospital shift was vitals and computer entry. Much more toileting and bathing in LTC --- in hospital, there are not shower areas where you take the patients. Showers are only used if ambulatory. Lots of feeding residents in LTC, not so much in hospital.
As far as bodily fluids, much more in hospital. LTC was a lot of diaper changing, but hospital had many more fluids (G I bleed is everyone's favorite).
Large difference between hospital and LTC --- too many differences to detail all.
Regardless of venue, yes, it's hard, dirty, physcially demanding work. Can you do this and go to school? Up to you.
But, if you can't deal with bodily fluids, blood, ulcers, potential exposure to various diseases including TB, you do not belong in nursing...