@ER1 Learn as much as you can so you can decide on the best option to pursue.
Kung mag-student visa ka aside from ensuring the course is for an occupation in the migration list, also check what the requirements are for a positive skills assessment. May occupations na kailangan may X years of experience after obtaining a degree. Since it seems na hindi related to any occupation in the list yung current occupation mo, this means you might have to get related work experience after you finish your course. This is not to discourage you but to give you tips on things to consider.