I study/I'm studying - both can be used. The idea behind the progressive form is that it's a temporary thing. If someone says 'I'm working as...', they probably mean that they don't plan to make a career of the job. With studying, it doesn't really make any difference as courses are always temporary. 'I'm hopin g' places more emphasis on the current situation- 'I'm hoping that he'll be there' suggests that there is a real risk he won't be there so I am hoping with extra force.
Student or Learner