What i want to learn about my career

There is alot i want to know about being a Vet and a Nurse.The main things i want to know is how much does it pay,what do i have to learn and how many different kinds of vets and nurses are there.I want to know the difficulties of being a vet or nurse.Is it hard or fairly easy? I want to know eveything there is to know about being a Vet or Nurse.